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class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"510\\\" data-height=\\\"598\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-a24e35690f2b0047.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/510\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-a24e35690f2b0047.png\\\" data-original-width=\\\"510\\\" data-original-height=\\\"598\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"40529\\\" data-image-index=\\\"0\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<blockquote><p>3NF\uff0c\u7b2c\u4e09\u8303\u5f0f(Third Normal Form) \u662f\u6307\u8868\u4e2d\u7684\u6240\u6709\u6570\u636e\u5143\u7d20\u4e0d\u4f46\u8981\u80fd\u552f\u4e00\u5730\u88ab\u4e3b\u5173\u952e\u5b57\u6240\u6807\u8bc6\uff0c\u800c\u4e14\u5b83\u4eec\u4e4b\u95f4\u8fd8\u5fc5\u987b\u76f8\u4e92\u72ec\u7acb\uff0c\u4e0d\u5b58\u5728\u5176\u4ed6\u7684\u51fd\u6570\u5173\u7cfb\u3002<\/p><\/blockquote>\n<p><strong>\uff081\uff09\u8bbe\u8ba1\u4f01\u4e1a\u6a21\u5f0f<\/strong><br \/>\n\u5229\u7528\u4e0a\u8ff0\u5f97\u5230\u7684 3NF 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\/>\n\u6839\u636e\u4e0a\u4e00\u6b65\u5f97\u5230\u7684\u4f01\u4e1a\u6a21\u5f0f\u9009\u5b9a\u6570\u636e\u6a21\u578b\uff0c\u4ece\u800c\u5f97\u51fa\u9002\u7528\u4e8e\u67d0\u4e2a DBMS \u7684\u903b\u8f91\u6a21\u5f0f\u3002\u6839\u636e\u903b\u8f91\u6a21\u5f0f\u5bfc\u51fa\u5404\u79cd\u62a5\u8868\u4e0e\u4e8b\u52a1\u5904\u7406\u6240\u4f7f\u7528\u7684\u5916\u6a21\u5f0f\u3002<br \/>\n<strong>\uff083\uff09\u8bbe\u8ba1\u6570\u636e\u5e93\u7269\u7406\u6a21\u5f0f\uff08\u5b58\u50a8\u6a21\u5f0f\uff09<\/strong><br \/>\n\u6839\u636e\u6570\u636e\u5e93\u7684\u903b\u8f91\u6a21\u5f0f\u548c\u7ed9\u5b9a\u7684\u8ba1\u7b97\u673a\u7cfb\u7edf\u8bbe\u8ba1\u7269\u7406\u6a21\u5f0f\u3002<br \/>\n<strong>\uff084\uff09\u8bc4\u4ef7\u7269\u7406\u6a21\u5f0f<\/strong><br 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\/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p><strong>\uff081\uff09\u9700\u6c42\u5206\u6790<\/strong><br 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\/>\n<strong>\uff082\uff09\u5206\u6790\u548c\u6536\u96c6\u6570\u636e<\/strong><br \/>\n\u8fd9\u662f\u6574\u4e2a\u9700\u6c42\u5206\u6790\u7684\u6838\u5fc3\u4efb\u52a1\u3002\u5b83\u5305\u62ec\u5206\u6790\u548c\u6536\u96c6\u7528\u6237\u7684\u4fe1\u606f\u9700\u6c42\u3001\u5904\u7406\u9700\u6c42\u3001\u5b8c\u6574\u6027\u9700\u6c42\u3001\u5b89\u5168\u6027\u9700\u6c42\uff0c\u4ee5\u53ca\u5bf9\u6570\u636e\u5e93\u8bbe\u8ba1\u8fc7\u7a0b\u6709\u7528\u7684\u5176\u4ed6\u4fe1\u606f\u3002<br \/>\n\u4fe1\u606f\u9700\u6c42\u662f\u6307\u5728\u8bbe\u8ba1\u76ee\u6807\u8303\u56f4\u5185\u6d89\u53ca\u7684\u6240\u6709\u5b9e\u4f53\u3001\u5b9e\u4f53\u7684\u5c5e\u6027\u53ca\u5b9e\u4f53\u95f4\u7684\u8054\u7cfb\u7b49\u6570\u636e\u5bf9\u8c61\uff0c\u5305\u62ec\u7528\u6237\u5728\u6570\u636e\u5904\u7406\u4e2d\u7684\u8f93\u5165\/\u8f93\u51fa\u6570\u636e\u53ca\u8fd9\u4e9b\u6570\u636e\u95f4\u7684\u8054\u7cfb\u3002\u5728\u6536\u96c6\u4e2d\uff0c\u8981\u6536\u96c6\u6570\u636e\u7684\u540d\u79f0\u3001\u7c7b\u578b\u3001\u957f\u5ea6\u3001\u6570\u636e\u91cf\u3001\u5bf9\u6570\u636e\u7684\u7ea6\u675f\u53ca\u6570\u636e\u95f4\u8054\u7cfb\u7684\u7c7b\u578b\u7b49\u4fe1\u606f\u3002<br \/>\n\u5904\u7406\u9700\u6c42\u662f\u6307\u4e3a\u4e86\u83b7\u5f97\u6240\u9700\u7684\u4fe1\u606f\u800c\u5bf9\u6570\u636e\u52a0\u5de5\u5904\u7406\u7684\u8981\u6c42\u3002\u5b83\u4e3b\u8981\u5305\u62ec\uff0c\u5904\u7406\u65b9\u5f0f\u662f\u5b9e\u65f6\u8fd8\u662f\u6279\u5904\u7406\uff0c\u5404\u79cd\u5904\u7406\u53d1\u751f\u7684\u9891\u5ea6\u3001\u54cd\u5e94\u65f6\u95f4\u3001\u4f18\u5148\u7ea7\u522b\u53ca\u5b89\u5168\u4fdd\u5bc6\u8981\u6c42\u7b49\u3002\u6240\u8981\u6536\u96c6\u7684\u5176\u4ed6\u4fe1\u606f\u8fd8\u6709\u4f01\u4e1a\u5728\u7ba1\u7406\u65b9\u5f0f\u3001\u7ecf\u8425\u65b9\u5f0f\u7b49\u65b9\u9762\u53ef\u80fd\u53d1\u751f\u7684\u53d8\u5316\u7b49\u3002<br \/>\n\u5206\u6790\u548c\u6536\u96c6\u6570\u636e\u7684\u8fc7\u7a0b\u662f\u6570\u636e\u5e93\u8bbe\u8ba1\u8005\u5bf9\u5404\u7c7b\u7ba1\u7406\u6d3b\u52a8\u8fdb\u884c\u6df1\u5165\u8c03\u67e5\u7814\u7a76\u7684\u8fc7\u7a0b\uff0c\u8c03\u67e5\u5bf9\u8c61\u5305\u62ec\u6570\u636e\u7ba1\u7406\u90e8\u95e8\u7684\u8d1f\u8d23\u4eba\u3001\u5404\u4f7f\u7528\u90e8\u95e8\u7684\u8d1f\u8d23\u4eba\u53ca\u64cd\u4f5c\u5458\u7b49\u5404\u7c7b\u7ba1\u7406\u4eba\u5458\uff0c\u901a\u8fc7\u4e0e\u5404\u7c7b\u7ba1\u7406\u4eba\u5458\u76f8\u4e92\u4ea4\u6d41\uff0c\u9010\u6b65\u53d6\u5f97\u5bf9\u9700\u6c42\u7684\u4e00\u81f4\u8ba4\u8bc6\u3002<br \/>\n<strong>\uff083\uff09\u6574\u7406\u6587\u6863<\/strong><br \/>\n\u5206\u6790\u548c\u6536\u96c6\u5f97\u5230\u7684\u6570\u636e\u5fc5\u987b\u7ecf\u8fc7\u7b5b\u9009\u6574\u7406\uff0c\u5e76\u6309\u4e00\u5b9a\u683c\u5f0f\u548c\u987a\u5e8f\u8bb0\u8f7d\u4fdd\u5b58\uff0c\u7ecf\u8fc7\u5ba1\u6838\u6210\u4e3a\u6b63\u5f0f\u7684\u9700\u6c42\u8bf4\u660e\u6587\u6863\uff0c\u5373\u9700\u6c42\u8bf4\u660e\u4e66\u3002\u5b9e\u9645\u4e0a\uff0c\u9700\u6c42\u8bf4\u660e\u4e66\u662f\u5728\u9700\u6c42\u5206\u6790\u7684\u8fc7\u7a0b\u4e2d\u9010\u6e10\u6574\u7406\u5f62\u6210\u7684\uff0c\u662f\u968f\u7740\u8fd9\u4e00\u8fc7\u7a0b\u7684\u4e0d\u65ad\u6df1\u5165\u800c\u53cd\u590d\u4fee\u6539\u4e0e\u5b8c\u5584\u7684\u5bf9\u7cfb\u7edf\u9700\u6c42\u5206\u6790\u7684\u5168\u9762\u63cf\u8ff0\u3002\u7531\u7528\u6237\u3001\u9886\u5bfc\u548c\u4e13\u5bb6\u5171\u540c\u8bc4\u5ba1\uff0c\u662f\u4ee5\u540e\u5404\u8bbe\u8ba1\u9636\u6bb5\u7684\u4e3b\u8981\u4f9d\u636e\u3002\u8fd9\u4e00\u6b65\u7684\u5de5\u4f5c\u662f\u8fdb\u884c\u5168\u9762\u7684\u6c47\u603b\u4e0e\u6574\u7406\uff0c\u4f7f\u4e4b\u7cfb\u7edf\u5316\uff0c\u4ee5\u5f62\u6210\u6807\u51c6\u5316\u7684\u7edf\u4e00\u5f62\u5f0f\u3002<\/p>\n<h2>4 \u6982\u5ff5\u7ed3\u6784\u8bbe\u8ba1<\/h2>\n<p>\u6982\u5ff5\u7ed3\u6784\u8bbe\u8ba1\u9636\u6bb5\u6240\u6d89\u53ca\u7684\u4fe1\u606f\u4e0d\u4f9d\u8d56\u4e8e\u4efb\u4f55\u5b9e\u9645\u5b9e\u73b0\u65f6\u7684\u73af\u5883\uff0c\u5373\u8ba1\u7b97\u673a\u7684\u786c\u4ef6\u548c\u8f6f\u4ef6\u7cfb\u7edf\u3002\u6982\u5ff5\u7ed3\u6784\u8bbe\u8ba1\u7684\u76ee\u6807\u662f\u4ea7\u751f\u4e00\u4e2a\u7528\u6237\u6613\u4e8e\u7406\u89e3\u7684\uff0c\u53cd\u6620\u7cfb\u7edf\u4fe1\u606f\u9700\u6c42\u7684\u6574\u4f53\u6570\u636e\u5e93\u6982\u5ff5\u7ed3\u6784\u3002\u6982\u5ff5\u7ed3\u6784\u8bbe\u8ba1\u7684\u4efb\u52a1\u662f\uff0c\u5728\u9700\u6c42\u5206\u6790\u4e2d\u4ea7\u751f\u7684\u9700\u6c42\u8bf4\u660e\u4e66\u7684\u57fa\u7840\u4e0a\u6309\u7167\u4e00\u5b9a\u7684\u65b9\u6cd5\u62bd\u8c61\u6210\u6ee1\u8db3\u5e94\u7528\u9700\u6c42\u7684\u7528\u6237\u7684\u4fe1\u606f\u7ed3\u6784\uff0c\u5373\u901a\u5e38\u6240\u79f0\u7684\u6982\u5ff5\u6a21\u578b\u3002\u6982\u5ff5\u7ed3\u6784\u7684\u8bbe\u8ba1\u8fc7\u7a0b\u5c31\u662f\u6b63\u786e\u9009\u62e9\u8bbe\u8ba1\u7b56\u7565\u3001\u8bbe\u8ba1\u65b9\u6cd5\u548c\u6982\u5ff5\u6570\u636e\u6a21\u578b\u5e76\u52a0\u4ee5\u5b9e\u65bd\u7684\u8fc7\u7a0b\u3002<br \/>\n\u6982\u5ff5\u6570\u636e\u6a21\u578b\u7684\u4f5c\u7528\u662f\uff1a\u63d0\u4f9b\u80fd\u591f\u8bc6\u522b\u548c\u7406\u89e3\u7cfb\u7edf\u8981\u6c42\u7684\u6846\u67b6\uff1b\u4e3a\u6570\u636e\u5e93\u63d0\u4f9b\u4e00\u4e2a\u8bf4\u660e\u6027\u7ed3\u6784\uff0c\u4f5c\u4e3a\u8bbe\u8ba1\u6570\u636e\u5e93\u903b\u8f91\u7ed3\u6784\uff0c\u5373\u903b\u8f91\u6a21\u578b\u7684\u57fa\u7840\u3002<br \/>\n\u6982\u5ff5\u6a21\u578b\u7684\u63cf\u8ff0\u5de5\u5177\u5e94\u8be5\u80fd\u591f\u4f53\u73b0\u6982\u5ff5\u6a21\u578b\u7684\u7279\u70b9\uff0c\u5982 E-R \u6a21\u578b\u3002\u8fd1\u5e74\u6765\uff0c\u7531\u4e8e\u9762\u5411\u5bf9\u8c61\u6570\u636e\u6a21\u578b\u5177\u6709\u66f4\u4e30\u5bcc\u7684\u8bed\u4e49\u3001\u66f4\u5f3a\u7684\u63cf\u8ff0\u80fd\u529b\u800c\u8d8a\u6765\u8d8a\u53d7\u5230\u4eba\u4eec\u7684\u91cd\u89c6\uff0c\u4e0d\u4f46\u51fa\u73b0\u4e86\u5546\u54c1\u5316\u7684\u9762\u5411\u5bf9\u8c61 DBMS\uff0c\u800c\u4e14\u5f00\u59cb\u5b9e\u9645\u5e94\u7528\u4e8e\u6982\u5ff5\u6a21\u578b\u7684\u8bbe\u8ba1\u4e2d\uff0c\u4f5c\u4e3a\u6570\u636e\u5e93\u6982\u5ff5\u8bbe\u8ba1\u7684\u5de5\u5177\u3002<br \/>\nTeory \u7b49\u4eba\u63d0\u51fa\u7684\u6269\u5c55\u7684 E-R \u6a21\u578b\u589e\u52a0\u4e86\u7c7b\u4f3c\u9762\u5411\u5bf9\u8c61\u6570\u636e\u6a21\u578b\u4e2d\u7684\u666e\u904d\u5316\u548c\u805a\u5408\u7b49\u8bed\u4e49\u63cf\u8ff0\u673a\u5236\uff0c\u4e3a\u8fd9\u79cd\u6700\u4e3a\u4eba\u4eec\u719f\u6089\u7684\u6570\u636e\u6a21\u578b\u6ce8\u5165\u4e86\u65b0\u7684\u751f\u673a\uff0c\u4e3a\u6982\u5ff5\u6a21\u578b\u7684\u63cf\u8ff0\u589e\u52a0\u4e86\u4e00\u79cd\u7406\u60f3\u7684\u9009\u62e9\u3002<br \/>\nE-R \u6a21\u578b\u7b80\u79f0 E-R \u56fe\uff0c\u5b83\u662f\u63cf\u8ff0\u6982\u5ff5\u4e16\u754c\uff0c\u5efa\u7acb\u6982\u5ff5\u6a21\u578b\u7684\u5b9e\u7528\u5de5\u5177\u3002 E-R \u56fe\u5305\u62ec3\u4e2a\u8981\u7d20 :<\/p>\n<ol>\n<li>\u5b9e\u4f53( \u578b) : \u7528\u77e9\u5f62\u6846\u8868\u793a\uff0c\u6846\u5185\u6807\u6ce8\u5b9e\u4f53\u540d\u79f0\uff1b<\/li>\n<li>\u5c5e\u6027 : \u7528\u692d\u5706\u5f62\u8868\u793a\uff0c\u5e76\u7528\u8fde\u7ebf\u4e0e\u5b9e\u4f53\u8fde\u63a5\u8d77\u6765\uff1b<\/li>\n<li>\u5b9e\u4f53\u4e4b\u95f4\u7684\u8054\u7cfb : \u7528\u83f1\u5f62\u6846\u8868\u793a\uff0c\u6846\u5185\u6807\u6ce8\u8054\u7cfb\u540d\u79f0\uff0c\u5e76\u7528\u8fde\u7ebf\u5c06\u83f1\u5f62\u6846\u5206\u522b\u4e0e\u6709\u5173\u5b9e\u4f53\u76f8\u8fde\uff0c\u5e76\u5728\u8fde\u7ebf\u4e0a\u6ce8\u660e\u8054\u7cfb\u7c7b\u578b\u3002<\/li>\n<\/ol>\n<p>\u56fe 12 \u5c31\u662f\u4e00\u4e2a\u6559\u5b66\u7cfb\u7edf\u7684 E-R\u56fe ( \u4e3a\u4e86\u7b80\u5355\u8d77\u89c1\uff0c\u7701\u7565\u4e86\u90e8\u5206\u5b9e\u4f53\u7684\u5c5e\u6027\u548c\u8054\u7cfb\u7684\u5c5e\u6027 )\uff1a<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"584\\\" data-height=\\\"513\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-f7414655ff2bdaf3.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/584\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-f7414655ff2bdaf3.png\\\" data-original-width=\\\"584\\\" data-original-height=\\\"513\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"26980\\\" data-image-index=\\\"2\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p>\u6982\u5ff5\u7ed3\u6784\u7684\u8bbe\u8ba1\u7b56\u7565\u4e3b\u8981\u6709\u81ea\u5e95\u5411\u4e0a\u3001\u81ea\u9876\u5411\u4e0b\u3001\u7531\u91cc\u5411\u5916\u548c\u6df7\u5408\u7b56\u7565\u3002\u5728\u5177\u4f53\u5b9e\u73b0\u8bbe\u8ba1\u76ee\u6807\u65f6\u6709\u4e24\u79cd\u6781\u7aef\u7684\u7b56\u7565\u6216\u65b9\u6848\uff0c\u4e00\u662f\u5efa\u7acb\u4e00\u4e2a\u8986\u76d6\u6574\u4e2a\u5355\u4f4d\u6240\u6709\u529f\u80fd\u57df\u7684\u5168\u5c40\u6570\u636e\u5e93\uff0c\u79f0\u4e4b\u4e3a\u5168\u5c40\u65b9\u6848\u6216\u5168\u5c40\u7b56\u7565\uff1b\u53e6\u4e00\u79cd\u5219\u662f\u5bf9\u6bcf\u4e00\u4e2a\u5e94\u7528\u90fd\u5efa\u7acb\u4e00\u4e2a\u5355\u72ec\u7684\u6570\u636e\u5e93\uff0c\u79f0\u4e4b\u4e3a\u5e94\u7528\u65b9\u6848\u6216\u5e94\u7528\u7b56\u7565\u3002<br \/>\n\u7531\u4e8e\u5404\u4e2a\u90e8\u95e8\u5bf9\u4e8e\u6570\u636e\u7684\u9700\u6c42\u548c\u5904\u7406\u65b9\u6cd5\u5404\u4e0d\u76f8\u540c\uff0c\u5bf9\u540c\u4e00\u7c7b\u6570\u636e\u7684\u89c2\u70b9\u4e5f\u53ef\u80fd\u4e0d\u4e00\u6837\uff0c\u5b83\u4eec\u6709\u81ea\u5df1\u7684\u89c6\u56fe\uff0c\u6240\u4ee5\u53ef\u4ee5\u9996\u5148\u6839\u636e\u9700\u6c42\u5206\u6790\u9636\u6bb5\u4ea7\u751f\u7684\u5404\u4e2a\u90e8\u95e8\u7684\u6570\u636e\u6d41\u56fe\u548c\u6570\u636e\u5b57\u5178\u4e2d\u7684\u76f8\u5173\u6570\u636e\u8bbe\u8ba1\u51fa\u5404\u81ea\u7684\u5c40\u90e8\u89c6\u56fe\uff0c\u7136\u540e\u8fdb\u884c\u89c6\u56fe\u96c6\u6210\u3002<\/p>\n<h3>4.1 \u89c6\u56fe\u8bbe\u8ba1<\/h3>\n<p>\u5728\u5b9e\u4f53\u5206\u6790\u6cd5\u4e2d\uff0c\u5c40\u90e8\u89c6\u56fe\u8bbe\u8ba1\u7684\u7b2c\u4e00\u6b65\u662f\u786e\u5b9a\u5176\u6240\u5c5e\u7684\u8303\u56f4\uff0c\u5373\u5b83\u6240\u5bf9\u5e94\u7684\u7528\u6237\u7ec4\uff0c\u7136\u540e\u5bf9\u6bcf\u4e2a\u7528\u6237\u7ec4\u5efa\u7acb\u4e00\u4e2a\u4ec5\u7531\u5b9e\u4f53\u3001\u8054\u7cfb\u53ca\u5b83\u4eec\u7684\u6807\u8bc6\u7801\u7ec4\u6210\u7684\u5c40\u90e8\u4fe1\u606f\u7ed3\u6784\uff08\u5c40\u90e8\u6570\u636e\u6a21\u5f0f\uff09\u6846\u67b6\uff0c\u6700\u540e\u518d\u52a0\u5165\u6709\u5173\u7684\u63cf\u8ff0\u4fe1\u606f\uff0c\u5f62\u6210\u5b8c\u6574\u7684\u5c40\u90e8\u89c6\u56fe\uff08\u5c40\u90e8\u6570\u636e\u6a21\u5f0f\uff09\u3002\u8fd9\u6837\u505a\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u96c6\u4e2d\u7cbe\u529b\u5904\u7406\u597d\u7528\u6237\u6570\u636e\u9700\u6c42\u7684\u4e3b\u8981\u65b9\u9762\uff0c\u907f\u514d\u56e0\u65e0\u5173\u7d27\u8981\u7684\u63cf\u8ff0\u7ec6\u8282\u800c\u5f71\u54cd\u5c40\u90e8\u4fe1\u606f\u7ed3\u6784\u7684\u6b63\u786e\u6027\u3002\u6574\u4e2a\u8fc7\u7a0b\u53ef\u5206\u4e3a 4 \u4e2a\u6b65\u9aa4\uff1a\u786e\u5b9a\u5c40\u90e8\u89c6\u56fe\u7684\u8303\u56f4\uff1b\u8bc6\u522b\u5b9e\u4f53\u53ca\u5176\u6807\u8bc6\uff1b\u786e\u5b9a\u5b9e\u4f53\u95f4\u7684\u8054\u7cfb\uff1b\u5206\u914d\u5b9e\u4f53\u53ca\u8054\u7cfb\u7684\u5c5e\u6027\u3002<\/p>\n<h4>4.1.1 \u786e\u5b9a\u5c40\u90e8\u89c6\u56fe\u7684\u8303\u56f4<\/h4>\n<p>\u9700\u6c42\u8bf4\u660e\u4e66\u4e2d\u6807\u660e\u7684\u7528\u6237\u89c6\u56fe\u8303\u56f4\u53ef\u4ee5\u4f5c\u4e3a\u786e\u5b9a\u5c40\u90e8\u89c6\u56fe\u8303\u56f4\u7684\u57fa\u672c\u4f9d\u636e\uff0c\u4f46\u5b83\u901a\u5e38\u4e0e\u5b50\u6a21\u5f0f\u8303\u56f4\u76f8\u5bf9\u5e94\uff0c\u6709\u65f6\u56e0\u4e3a\u8fc7\u5927\u800c\u4e0d\u5229\u4e8e\u5c40\u90e8\u4fe1\u606f\u7ed3\u6784\u7684\u6784\u9020\uff0c\u6545\u53ef\u6839\u636e\u60c5\u51b5\u4fee\u6539\uff0c\u4f46\u4e5f\u4e0d\u5b9c\u5206\u5f97\u8fc7\u5c0f\uff0c\u8fc7\u5c0f\u4f1a\u9020\u6210\u5c40\u90e8\u89c6\u56fe\u7684\u6570\u91cf\u592a\u5927\u53ca\u5927\u91cf\u7684\u6570\u636e\u5197\u4f59\u548c\u4e0d\u4e00\u81f4\u6027\uff0c\u7ed9\u4ee5\u540e\u7684\u89c6\u56fe\u96c6\u6210\u5e26\u6765\u5f88\u5927\u7684\u56f0\u96be\u3002<br \/>\n\u5c40\u90e8\u89c6\u56fe\u8303\u56f4\u786e\u5b9a\u7684\u57fa\u672c\u539f\u5219\u662f\uff1a\u5404\u4e2a\u5c40\u90e8\u89c6\u56fe\u652f\u6301\u7684\u529f\u80fd\u57df\u4e4b\u95f4\u7684\u8054\u7cfb\u5e94\u6700\u5c11\u3002<br \/>\n\u5b9e\u4f53\u4e2a\u6570\u9002\u91cf\u3002 \u4e00\u4e2a\u5c40\u90e8\u89c6\u56fe\u6240\u5305\u542b\u7684\u5b9e\u4f53\u6570\u91cf\u53cd\u6620\u4e86\u8be5\u5c40\u90e8\u89c6\u56fe\u7684\u590d\u6742\u6027\uff0c \u6309\u7167\u4fe1\u606f\u8bba\u4e2d\u201c7 2\u201d\u7684\u89c2\u70b9\uff0c \u4eba\u4eec\u5728\u540c\u4e00\u65f6\u523b\u53ef\u540c\u65f6\u987e\u53ca\u7684\u4e8b\u60c5\u4e00\u822c\u5728 5\uff5e9 \u4e4b\u95f4\uff0c \u5176\u4e2d\u4ee5 6 \u6216 7 \u6700\u4e3a\u9002\u5f53\u3002\u56e0\u6b64\uff0c\u4e00\u4e2a\u5c40\u90e8\u89c6\u56fe\u5185\u7684\u5b9e\u4f53\u6570\u4e0d\u5b9c\u8d85\u8fc7 9 \u4e2a\uff0c\u5426\u5219\u5c31\u4f1a\u8fc7\u4e8e\u590d\u6742\uff0c\u4e0d\u4fbf\u4e8e\u4eba\u4eec\u7406\u89e3\u548c\u7ba1\u7406\u3002<\/p>\n<h4>4.1.2 \u8bc6\u522b\u5b9e\u4f53\u53ca\u5176\u6807\u8bc6<\/h4>\n<p>\u5728\u9700\u6c42\u5206\u6790\u4e2d\uff0c\u4eba\u4eec\u5df2\u7ecf\u521d\u6b65\u5730\u8bc6\u522b\u4e86\u5404\u7c7b\u5b9e\u4f53\u3001\u5b9e\u4f53\u95f4\u7684\u8054\u7cfb\u53ca\u63cf\u8ff0\u5176\u6027\u8d28\u7684\u6570\u636e\u5143\u7d20\uff0c\u8fd9\u4e9b\u7edf\u79f0\u4e3a\u6570\u636e\u5bf9\u8c61\uff0c\u5b83\u4eec\u662f\u8fdb\u4e00\u6b65\u8bbe\u8ba1\u7684\u57fa\u672c\u7d20\u6750\u3002\u8fd9\u4e00\u6b65\u7684\u4efb\u52a1\u5c31\u662f\u5728\u786e\u5b9a\u7684\u5c40\u90e8\u89c6\u56fe\u8303\u56f4\u5185\uff0c\u8bc6\u522b\u54ea\u4e9b\u6570\u636e\u5bf9\u8c61\u4f5c\u4e3a\u5c40\u90e8\u89c6\u56fe\u7684\u57fa\u672c\u5b9e\u4f53\u53ca\u5176\u6807\u8bc6\uff0c\u5e76\u5b9a\u4e49\u6709\u5173\u6570\u636e\u5bf9\u8c61\u5728 E-R \u6a21\u578b\u4e2d\u7684\u5730\u4f4d\u3002<\/p>\n<h4>4.1.3 \u786e\u5b9a\u5b9e\u4f53\u95f4\u7684\u8054\u7cfb<\/h4>\n<p>\u5b9e\u9645\u4e0a\uff0c\u8bc6\u522b\u8054\u7cfb\u7684\u4e3b\u8981\u4efb\u52a1\u662f\u5728\u9700\u6c42\u5206\u6790\u9636\u6bb5\u5b8c\u6210\u7684\u3002\u8fd9\u91cc\u7684\u5de5\u4f5c\u4e00\u662f\u4ece\u5c40\u90e8\u89c6\u56fe\u7684\u89d2\u5ea6\u8fdb\u884c\u4e00\u6b21\u5ba1\u6838\uff0c\u68c0\u67e5\u6709\u65e0\u9057\u6f0f\u4e4b\u5904\uff0c\u4e8c\u662f\u786e\u5207\u5730\u5b9a\u4e49\u6bcf\u4e00\u79cd\u8054\u7cfb\u3002<br \/>\n\u5728\u73b0\u5b9e\u4e16\u754c\u4e2d\uff0c\u8bf8\u591a\u5f62\u5f0f\u7684\u8054\u7cfb\u5927\u81f4\u53ef\u5206\u4e3a\u4e09\u7c7b\uff1a\u5b58\u5728\u6027\u8054\u7cfb\u3001\u529f\u80fd\u6027\u8054\u7cfb\u548c\u4e8b\u4ef6\u8054\u7cfb\u3002<\/p>\n<ol>\n<li>\u5b58\u5728\u6027\u8054\u7cfb\u5982\u5b66\u6821\u6709\u6559\u5e08\u3001\u6559\u5ba4\u6709\u5b66\u751f\u3001\u5de5\u5382\u6709\u4ea7\u54c1\u3001\u4ea7\u54c1\u6709\u987e\u5ba2\u7b49\uff1b<\/li>\n<li>\u529f\u80fd\u6027\u8054\u7cfb\u5982\u6559\u5e08\u8bb2\u6388\u8bfe\u7a0b\u3001\u6559\u5e08\u53c2\u4e0e\u79d1\u7814\u3001\u4ed3\u5e93\u7ba1\u7406\u5458\u7ba1\u7406\u4ed3\u5e93\u7b49\uff1b<\/li>\n<li>\u4e8b\u4ef6\u8054\u7cfb\u5982\u5b66\u751f\u501f\u4e66\u3001\u4ea7\u54c1\u53d1\u8fd0\u7b49\u3002<\/li>\n<\/ol>\n<p>\u6839\u636e\u4e0a\u8ff0\u5206\u7c7b\u4ed4\u7ec6\u68c0\u67e5\u5728\u7ed9\u5b9a\u7684\u5c40\u90e8\u89c6\u56fe\u8303\u56f4\u5185\u662f\u5426\u6709\u672a\u8bc6\u522b\u7684\u8054\u7cfb\uff0c\u5728\u786e\u8ba4\u6240\u6709\u7684\u8054\u7cfb\u90fd\u5df2\u8bc6\u522b\u5e76\u65e0\u9057\u6f0f\u4e4b\u540e\uff0c\u8fd8\u9700\u5bf9\u8054\u7cfb\u8fdb\u884c\u6b63\u786e\u7684\u5b9a\u4e49\u3002\u5b9a\u4e49\u8054\u7cfb\u5c31\u662f\u5bf9\u8054\u7cfb\u8bed\u4e49\u7684\u4ed4\u7ec6\u5206\u6790\uff0c\u8bc6\u522b\u8054\u7cfb\u7684\u7c7b\u578b\uff0c\u786e\u5b9a\u5b9e\u4f53\u5728\u8054\u7cfb\u4e2d\u7684\u53c2\u4e0e\u5ea6\u3002<br \/>\n<strong>\uff081\uff09\u4e8c\u5143\u8054\u7cfb\u7684\u7c7b\u578b\u4e0e\u5b9a\u4e49<\/strong><br \/>\n\u4e8c\u5143\u8054\u7cfb\u662f\u6307\u4e24\u4e2a\u5b9e\u4f53\u7c7b\u4e4b\u95f4\u7684\u8054\u7cfb\u3002\u6839\u636e\u53c2\u4e0e\u8054\u7cfb\u7684\u4e24\u4e2a\u5b9e\u4f53\u7c7b\u503c\u4e4b\u95f4\u7684\u5bf9\u5e94\u5173\u7cfb\u5206\u4e3a\u4e00\u5bf9\u4e00\u3001\u4e00\u5bf9\u591a\u53ca\u591a\u5bf9\u591a\u4e09\u79cd\u7c7b\u578b\u3002<\/p>\n<ol>\n<li>\u4e00\u5bf9\u4e00\u8054\u7cfb<\/li>\n<\/ol>\n<p>\u8fd9\u662f\u4e00\u79cd\u6700\u7b80\u5355\u7684\u8054\u7cfb\u7c7b\u578b\u3002\u82e5\u5bf9\u4e8e\u5b9e\u4f53\u96c6 A \u4e2d\u7684\u6bcf\u4e00\u4e2a\u5b9e\u4f53\uff0c\u5b9e\u4f53\u96c6 B \u4e2d\u81f3\u591a\u6709\u4e00\u4e2a\u5b9e\u4f53\u4e0e\u4e4b\u8054\u7cfb\uff0c\u53cd\u4e4b\u4ea6\u7136\uff0c\u5219\u79f0\u5b9e\u4f53\u96c6 A \u4e0e\u5b9e\u4f53\u96c6 B \u5177\u6709\u4e00\u5bf9\u4e00\u8054\u7cfb\uff0c\u8bb0\u4e3a 1:1\u3002<br \/>\n\u4f8b\u5982\u5728\u4e00\u4e2a\u65bd\u5de5\u5355\u4f4d\u4e2d\uff0c\u5982\u679c\u89c4\u5b9a\u6bcf\u9879\u5de5\u7a0b\u6700\u591a\u53ea\u80fd\u7531\u4e00\u540d\u5de5\u7a0b\u5e08\u8d1f\u8d23\u7ba1\u7406\uff0c\u800c\u4e00\u540d\u5de5\u7a0b\u5e08\u6700\u591a\u4e5f\u53ea\u80fd\u8d1f\u8d23\u4e00\u9879\u5de5\u7a0b\uff0c\u5219\u5de5\u7a0b\u5e08\u4e0e\u5de5\u7a0b\u95f4\u7684\u8fd9\u79cd\u7ba1\u7406\u8054\u7cfb\u4fbf\u662f\u4e00\u5bf9\u4e00\u8054\u7cfb\u3002<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"431\\\" data-height=\\\"107\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-e568d54747db34df.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/431\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-e568d54747db34df.png\\\" data-original-width=\\\"431\\\" data-original-height=\\\"107\\\" 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class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"591\\\" data-height=\\\"137\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-fc68cec06e8da07d.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/591\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-fc68cec06e8da07d.png\\\" data-original-width=\\\"591\\\" data-original-height=\\\"137\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"8195\\\" data-image-index=\\\"6\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<ol start=\\\"4\\\">\n<li>\u5b9e\u4f53\u7c7b\u5185\u90e8\u7684\u8054\u7cfb<\/li>\n<\/ol>\n<p>\u8fd9\u79cd\u8054\u7cfb\u53d1\u751f\u5728\u540c\u4e00\u7c7b\u5b9e\u4f53\u7684\u4e0d\u540c\u5b9e\u4f53\u4e4b\u95f4\uff0c\u56e0\u6b64\u79f0\u4e3a\u5185\u90e8\u8054\u7cfb\u6216\u81ea\u8054\u7cfb\uff0c\u5b83\u4e5f\u662f\u4e00\u79cd\u4e8c\u5143\u8054\u7cfb\uff0c\u5176\u8868\u793a\u65b9\u5f0f\u4e0e\u524d\u9762\u7684\u4e8c\u5143\u8054\u7cfb\u5e76\u65e0\u4e0d\u540c\uff0c\u8981\u6ce8\u610f\u4ed4\u7ec6\u533a\u522b\u540c\u4e00\u5b9e<br \/>\n\u4f53\u7c7b\u4e2d\u7684\u4e0d\u540c\u5b9e\u4f53\u5728\u8054\u7cfb\u4e2d\u626e\u6f14\u7684\u4e0d\u540c\u89d2\u8272\u53ca\u8054\u7cfb\u6807\u8bc6\u7684\u9009\u62e9\u3002<br 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class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"223\\\" data-height=\\\"184\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-11202e67cd519414.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/223\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-11202e67cd519414.png\\\" data-original-width=\\\"223\\\" data-original-height=\\\"184\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"4372\\\" data-image-index=\\\"7\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p><strong>\uff082\uff09\u591a\u5143\u8054\u7cfb\u7684\u8bc6\u522b\u4e0e\u5b9a\u4e49<\/strong><br 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\/>\n\u5f53\u6240\u6709\u5c40\u90e8\u89c6\u56fe\u8bbe\u8ba1\u5b8c\u6bd5\uff0c\u5c31\u53ef\u5f00\u59cb\u89c6\u56fe\u96c6\u6210\u3002\u96c6\u6210\u8fc7\u7a0b\u4e2d\u4f1a\u53d1\u751f\u4e00\u4e9b\u51b2\u7a81\uff0c\u51b2\u7a81\u7684\u8868\u73b0\u548c\u5904\u7406\u7b56\u7565\u5982\u4e0b\uff1a<br \/>\n<strong>\uff081\uff09\u540c\u540d\u5f02\u4e49<\/strong><br \/>\n\u4e3a\u4e86\u53d1\u73b0\u4e0d\u540c\u89c6\u56fe\u95f4\u7684\u540c\u540d\u5f02\u4e49\u95ee\u9898\uff0c\u53ef\u4ee5\u5217\u51fa\u6240\u6709\u540c\u540d\u6570\u636e\u5bf9\u8c61\uff0c\u7136\u540e\u9010\u4e00\u5224\u522b\u5176\u8bed\u4e49\u3002\u5bf9\u540c\u540d\u5f02\u4e49\u51b2\u7a81\u901a\u5e38\u91c7\u7528\u6362\u540d\u52a0\u4ee5\u89e3\u51b3\uff0c\u65e2\u53ef\u5bf9\u540c\u540d\u8005\u4e4b\u4e00\u6362\u540d\uff0c\u4e5f\u53ef\u5bf9\u4e24\u8005\u90fd\u7ed9\u4ee5\u91cd\u65b0\u547d\u540d\u3002\u8bc6\u522b\u8bed\u4e49\u7684\u4e3b\u8981\u65b9\u6cd5\u662f\u8fdb\u884c\u503c\u57df\u5206\u6790\u3002<br \/>\n<strong>\uff082\uff09\u5f02\u540d\u540c\u4e49<\/strong><br \/>\n\u8bc6\u522b\u5f02\u540d\u540c\u4e49\u6bd4\u8f83\u56f0\u96be\uff0c\u4e00\u822c\u7531\u8bbe\u8ba1\u8005\u5bf9\u6240\u6709\u5bf9\u8c61\u4e00\u4e2a\u4e0d\u6f0f\u5730\u9010\u4e00\u9274\u522b\u3002\u5b83\u540c\u6837\u91c7\u7528\u6362\u540d\u7684\u65b9\u6cd5\u89e3\u51b3\u3002\u82e5\u5f52\u5e76\u65f6\u8bd5\u56fe\u5c06\u5b83\u4eec\u5408\u5e76\u4e3a\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5219\u53ef\u4ee5\u628a\u5176\u4e2d\u4e4b\u4e00\u7684\u540d\u79f0\u4f5c\u4e3a\u5408\u5e76\u540e\u7684\u5bf9\u8c61\u540d\uff1b\u82e5\u96c6\u6210\u540e\uff0c\u5b83\u4eec\u4ecd\u4ee5\u4e24\u4e2a\u4e0d\u540c\u7684\u5bf9\u8c61\u5b58\u5728\uff0c\u5219\u53ef\u5bf9\u5176\u4e00\u6362\u540d\u3002\u5f53\u7136\uff0c\u82e5\u539f\u540d\u90fd\u4e0d\u5408\u9002\uff0c\u5219\u53ef\u4ee5\u5bf9\u4e24\u8005\u90fd\u91cd\u65b0\u547d\u540d\u3002<br \/>\n<strong>\uff083\uff09\u540c\u540d\u4e0d\u540c\u5c42\u6b21<\/strong><br \/>\n\u5982\u679c\u4e24\u4e2a\u5bf9\u8c61\u540c\u540d\uff0c\u4f46\u5176\u4e2d\u4e4b\u4e00\u662f\u4f5c\u4e3a\u4e00\u4e2a\u89c6\u56fe\u4e2d\u7684\u5b9e\u4f53\uff0c\u800c\u53e6\u4e00\u4e2a\u662f\u53e6\u4e00\u89c6\u56fe\u4e2d\u7684\u5c5e\u6027\uff0c\u5219\u5728\u96c6\u6210\u65f6\u5c31\u4f1a\u53d1\u751f\u540c\u540d\u4e0d\u540c\u5c42\u6b21\u7684\u51b2\u7a81\u3002\u89e3\u51b3\u8fd9\u79cd\u51b2\u7a81\u7684\u529e\u6cd5\u6709\u4e24\u4e2a\uff0c\u4e00\u662f\u5c06\u5c5e\u6027\u8f6c\u6362\u4e3a\u5b9e\u4f53\uff0c\u4e8c\u662f\u5c06\u5b9e\u4f53\u53d8\u6362\u6210\u5c5e\u6027\u3002<br \/>\n\u4f8b\u5982\uff0c\u8bbe\u4e00\u5c40\u90e8\u89c6\u56fe\u4e2d\u6709\u4e00\u90e8\u95e8\u5b9e\u4f53 DEPT\uff0c\u800c\u5728\u53e6\u4e00\u4e0e\u4e4b\u96c6\u6210\u7684\u89c6\u56fe\u4e2d\u6709\u804c\u5de5\u5b9e\u4f53 EMP\uff0c\u4e14 EMP \u6709\u5c5e\u6027 DEPT\uff0c\u4e8e\u662f\u53d1\u751f\u4e86\u540c\u540d\u4e0d\u540c\u5c42\u6b21\u7684\u51b2\u7a81\u3002\u6b64\u65f6\uff0c\u53ef\u5c06 EMP \u7684 DEPT\u5c5e\u6027\u53bb\u6389\uff0c\u53e6\u8bbe\u4e00\u4e2a\u5b9e\u4f53 DEPT \u4e0e EMP \u5efa\u7acb\u8054\u7cfb\uff0c\u8fd9\u65f6\u518d\u4e0e\u53e6\u4e00\u89c6\u56fe\u96c6\u6210\u5c31\u5bb9\u6613\u591a\u4e86\u3002<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"706\\\" data-height=\\\"291\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-8edaa3fe4c390191.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/706\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-8edaa3fe4c390191.png\\\" data-original-width=\\\"706\\\" data-original-height=\\\"291\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"19948\\\" data-image-index=\\\"9\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p>\u518d\u5982\uff0c\u8bbe\u4e00\u5c40\u90e8\u89c6\u56fe\u4e2d\u6709\u4e00\u540d\u4e3a STOR \u7684\u4ed3\u5e93\u5b9e\u4f53\uff0c\u5176\u4e2d\u542b\u6709\u4e00\u5c5e\u6027\u90e8\u95e8\u53f7\uff08 DEPT-NO\uff09\uff1b\u5728\u53e6\u4e00\u5c40\u90e8\u89c6\u56fe\u4e2d\u6709\u4e00\u5355\u4f4d\u5b9e\u4f53 DEPT\uff0c\u5176\u4e2d\u4ec5\u542b\u6709\u4e00\u4e2a\u5c5e\u6027 DEPT-NO\u3002\u5bf9\u8fd9\u7c7b\u540c\u540d\u4e0d\u540c\u5c42\u6b21\u7684\u51b2\u7a81\uff0c\u53ef\u5c06 DEPT \u5b9e\u4f53\u53d8\u6362\u4e3a\u5176\u6240\u5728\u89c6\u56fe\u4e2d\u4e0e DEPT \u76f8\u5173\u7684\u53e6\u4e00\u5b9e\u4f53\u7684\u5c5e\u6027\uff0c\u7136\u540e\u518d\u8fdb\u884c\u96c6\u6210\u3002<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"610\\\" data-height=\\\"340\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-ab2be26cb478f61b.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/610\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-ab2be26cb478f61b.png\\\" data-original-width=\\\"610\\\" data-original-height=\\\"340\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"21729\\\" data-image-index=\\\"10\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<blockquote><p>\u5b9e\u4f53\u53d8\u6362\u4e3a\u5c5e\u6027\u65f6\u901a\u5e38\u8981\u6ee1\u8db3\u4e00\u4e9b\u7279\u5b9a\u6761\u4ef6\uff0c\u4f8b\u5982\uff0c\u8be5\u5b9e\u4f53\u901a\u5e38\u53ea\u542b\u6709\u4e00\u4e2a\u4e0e\u540c\u540d\u5c5e\u6027\u5177\u6709\u5171\u540c\u7279\u5f81\u7684\u5c5e\u6027\uff0c\u4e14\u4e00\u5b9a\u5b58\u5728\u4e00\u4e2a\u4e0e\u8be5\u5b9e\u4f53\u5b58\u5728\u8054\u7cfb\u7684\u53e6\u5916\u7684\u5b9e\u4f53\u3002<\/p><\/blockquote>\n<p><strong>\uff084\uff09\u540c\u540d\u540c\u4e49\uff0c\u4f46\u5bf9\u8c61\u8054\u7cfb\u6d4b\u5ea6\u4e0d\u540c<\/strong><br \/>\n\u6240\u8c13\u8054\u7cfb\u6d4b\u5ea6\u662f\u6307\u5b9e\u4f53\u7684\u8054\u7cfb\u662f\u4e00\u5bf9\u4e00\u3001\u4e00\u5bf9\u591a\u8fd8\u662f\u591a\u5bf9\u591a\u3002\u82e5\u540c\u540d\u540c\u4e49\u5bf9\u8c61\u5728\u4e00\u4e2a\u5c40\u90e8\u89c6\u56fe\u4e2d\u4e3a\u4e00\u5bf9\u591a\u8054\u7cfb\uff0c\u5728\u53e6\u4e00\u5c40\u90e8\u89c6\u56fe\u4e2d\u4e3a\u591a\u5bf9\u591a\u8054\u7cfb\uff0c\u5219\u5728\u96c6\u6210\u65f6\u5c06\u53d1\u751f\u8054\u7cfb\u6d4b\u5ea6\u51b2\u7a81\u3002\u4e00\u822c\u800c\u8a00\uff0c\u4e00\u5bf9\u591a\u5305\u542b\u4e00\u5bf9\u4e00\uff0c\u591a\u5bf9\u591a\u5305\u542b\u4e00\u5bf9\u591a\u3002\u6240\u4ee5\u89e3\u51b3\u8fd9\u79cd\u51b2\u7a81\u7684\u65b9\u6cd5\u5f80\u5f80\u53d6\u8f83\u9ad8\u6d4b\u5ea6\u4e3a\u96c6\u6210\u540e\u7684\u76f8\u5e94\u8054\u7cfb\u7684\u6d4b\u5ea6\u3002<\/p>\n<h2>5 \u903b\u8f91\u7ed3\u6784\u8bbe\u8ba1<\/h2>\n<p>\u6570\u636e\u5e93\u903b\u8f91\u7ed3\u6784\u8bbe\u8ba1\u7684\u4efb\u52a1\u5c31\u662f\u628a\u6982\u5ff5\u7ed3\u6784\u8bbe\u8ba1\u9636\u6bb5\u8bbe\u8ba1\u597d\u7684\u57fa\u672c E-R \u56fe\u8f6c\u6362\u4e3a\u4e0e\u5177\u4f53\u673a\u5668\u4e0a\u7684 DBMS \u4ea7\u54c1\u6240\u652f\u6301\u7684\u6570\u636e\u6a21\u578b\u76f8\u7b26\u5408\u7684\u903b\u8f91\u7ed3\u6784\u3002\u8fd9\u4e00\u9636\u6bb5\u662f\u6570\u636e\u5e93\u7ed3\u6784\u8bbe\u8ba1\u7684\u91cd\u8981\u9636\u6bb5\u3002<br \/>\n\u6570\u636e\u5e93\u903b\u8f91\u8bbe\u8ba1\u7684\u57fa\u7840\u662f\u6982\u5ff5\u8bbe\u8ba1\u7684\u7ed3\u679c\uff0c\u800c\u5176\u6210\u679c\u5e94\u5305\u62ec\u67d0 DBMS \u6240\u652f\u6301\u7684\u5916\u6a21\u5f0f\u3001\u6982\u5ff5\u6a21\u5f0f\u53ca\u5176\u8bf4\u660e\u53ca\u5efa\u7acb\u5916\u6a21\u5f0f\u548c\u6982\u5ff5\u6a21\u5f0f\u7684 DDL \u7a0b\u5e8f\u3002\u56e0\u6b64\uff0c\u8fdb\u884c\u903b\u8f91\u8bbe\u8ba1\u524d\uff0c\u5fc5\u987b\u4e86\u89e3\u6570\u636e\u5e93\u8bbe\u8ba1\u7684\u9700\u6c42\u8bf4\u660e\u548c\u6982\u5ff5\u8bbe\u8ba1\u7684\u6210\u679c\uff08\u5305\u62ec E-R \u56fe\u548c\u5176\u4ed6\u6587\u6863\uff09\uff0c\u5e76\u4ed4\u7ec6\u9605\u8bfb\u6709\u5173DBMS \u7684\u6587\u4ef6\u3002\u6570\u636e\u5e93\u7684\u5916\u6a21\u5f0f\u548c\u6982\u5ff5\u6a21\u5f0f\u662f\u7528\u6237\u6240\u770b\u5230\u7684\u6570\u636e\u5e93\uff0c\u662f\u5e94\u7528\u7a0b\u5e8f\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u63a5\u53e3\uff0c\u56e0\u6b64\u5728\u6570\u636e\u5e93\u903b\u8f91\u8bbe\u8ba1\u9636\u6bb5\uff0c\u8fd8\u5fc5\u987b\u63d0\u4f9b\u5e94\u7528\u7a0b\u5e8f\u7f16\u5236\u7684\u6709\u5173\u8bf4\u660e\uff0c\u6700\u597d\u8bd5\u7f16\u4e00\u4e9b\u5178\u578b\u7684\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u4ee5\u68c0\u9a8c\u6240\u8bbe\u8ba1\u7684\u6982\u5ff5\u6a21\u5f0f\u662f\u5426\u6ee1\u8db3\u4f7f\u7528\u8981\u6c42\u3002\u6982\u5ff5\u6a21\u5f0f\u662f\u6570\u636e\u5e93\u7684\u57fa\u7840\uff0c\u5b83\u7684\u8bbe\u8ba1\u8d28\u91cf\u5bf9\u6570\u636e\u5e93\u7684\u4f7f\u7528\u548c\u6027\u80fd\uff0c\u4ee5\u53ca\u6570\u636e\u5e93\u5728\u4eca\u540e\u53d1\u5c55\u8fc7\u7a0b\u4e2d\u7684\u7a33\u5b9a\u6027\u5747\u6709\u76f4\u63a5\u7684\u5f71\u54cd\u3002\u4e3a\u4e86\u8bbe\u8ba1\u51fa\u80fd\u591f\u6b63\u786e\u53cd\u6620\u4e00\u4e2a\u9879\u76ee\u6570\u636e\u95f4\u5185\u5728\u8054\u7cfb\u7684\u597d\u7684\u6982\u5ff5\u6a21\u5f0f\uff0c\u8bbe\u8ba1\u65f6\u5fc5\u987b\u6b63\u786e\u5904\u7406\u5404\u79cd\u5e94\u7528\u7a0b\u5e8f\u4e4b\u95f4\u3001\u6570\u636e\u5e93\u6027\u80fd\u4e0e\u6570\u636e\u6a21\u5f0f\u7684\u5408\u7406\u6027\u548c\u7a33\u5b9a\u6027\u4e4b\u95f4\u7684\u5404\u79cd\u77db\u76fe\uff0c\u5bf9\u8bbe\u8ba1\u4e2d\u51fa\u73b0\u7684\u5404\u79cd\u77db\u76fe\u8981\u6743\u8861\u5229\u5f0a\uff0c\u5206\u6e05\u4e3b\u6b21\uff0c\u6309\u7edf\u7b79\u517c\u987e\u7684\u539f\u5219\u52a0\u4ee5\u6b63\u786e\u5904\u7406\u3002<br \/>\n\u903b\u8f91\u7ed3\u6784\u8bbe\u8ba1\u4e00\u822c\u5206\u4e3a\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\u5c06\u6982\u5ff5\u7ed3\u6784\u5411\u4e00\u822c\u5173\u7cfb\u6a21\u578b\u8f6c\u5316\uff1b<\/li>\n<li>\u5c06\u7b2c\u4e00\u6b65\u5f97\u5230\u7684\u7ed3\u6784\u5411\u7279\u5b9a\u7684 DBMS \u652f\u6301\u4e0b\u7684\u6570\u636e\u6a21\u578b\u8f6c\u6362\u3002<\/li>\n<li>\u4f9d\u636e\u5e94\u7528\u7684\u9700\u6c42\u548c\u5177\u4f53\u7684 DBMS \u7684\u7279\u5f81\u8fdb\u884c\u8c03\u6574\u4e0e\u5b8c\u5584\u3002<\/li>\n<\/ol>\n<p>\u4e0b\u9762\u4ee5\u5e38\u7528\u7684 E-R \u6a21\u578b\u548c\u6269\u5145 E-R \u6a21\u578b\u4e3a\u4e3b\uff0c\u9488\u5bf9\u5173\u7cfb\u6570\u636e\u5e93\u7684\u903b\u8f91\u8bbe\u8ba1\u4ecb\u7ecd\u57fa\u672c\u539f\u5219\u548c\u65b9\u6cd5\u3002<\/p>\n<h3>5.1 \u57fa\u672c E-R \u6a21\u578b\u5411\u5173\u7cfb\u6a21\u578b\u7684\u8f6c\u6362<\/h3>\n<p>\u57fa\u672c E-R \u6a21\u578b\u4e3b\u8981\u5305\u542b\u5b9e\u4f53\u548c\u8054\u7cfb\u4e24\u4e2a\u62bd\u8c61\u6982\u5ff5\uff0c\u5b9e\u4f53\u548c\u8054\u7cfb\u672c\u8eab\u8fd8\u53ef\u80fd\u9644\u6709\u82e5\u5e72\u5c5e\u6027\u3002\u5176\u8f6c\u6362\u7684\u57fa\u672c\u539f\u5219\u662f\uff0c\u5b9e\u4f53\u548c\u8054\u7cfb\u5206\u522b\u8f6c\u6362\u6210\u5173\u7cfb\uff0c\u5c5e\u6027\u5219\u8f6c\u6362\u6210\u76f8\u5e94\u5173\u7cfb\u7684\u5c5e\u6027\u3002\u56e0\u6b64\uff0c E-R \u6a21\u578b\u5411\u5173\u7cfb\u6a21\u578b\u7684\u8f6c\u6362\u6bd4\u8f83\u76f4\u89c2\uff0c\u4f46\u4e0d\u540c\u5143\u6570\u7684\u8054\u7cfb\u5177\u4f53\u8f6c\u6362\u65b9\u6cd5\u7a0d\u6709\u4e0d\u540c\uff0c\u4e0b\u9762\u6839\u636e\u4e0d\u540c\u7684\u60c5\u51b5\u5206\u522b\u8ba8\u8bba\u3002<br \/>\n<strong>\uff081\uff09\u4e00\u5bf9\u4e00\u8054\u7cfb<\/strong><br \/>\n\u4e00\u4e2a 1:1 \u8054\u7cfb\u53ef\u4ee5\u8f6c\u6362\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u5173\u7cfb\u6a21\u5f0f\uff0c\u4e5f\u53ef\u4ee5\u4e0e\u4efb\u610f\u4e00\u7aef\u5bf9\u5e94\u7684\u5173\u7cfb\u6a21\u5f0f\u5408\u5e76\u3002<br \/>\n\u5982\u679c\u8f6c\u6362\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u6a21\u5f0f\uff0c\u5219\u4e0e\u8be5\u8054\u7cfb\u76f8\u8fde\u7684\u5404\u5b9e\u4f53\u7684\u7801\u4ee5\u53ca\u8054\u7cfb\u672c\u8eab\u7684\u5c5e\u6027\u5747\u8f6c\u6362\u4e3a\u5173\u7cfb\u7684\u5c5e\u6027\uff0c\u6bcf\u4e2a\u5b9e\u4f53\u7684\u7801\u5747\u662f\u8be5\u5173\u7cfb\u7684\u5019\u9009\u952e\u3002<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"472\\\" data-height=\\\"361\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-5df22b6ca70f0bd7.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/472\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-5df22b6ca70f0bd7.png\\\" data-original-width=\\\"472\\\" data-original-height=\\\"361\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"18210\\\" data-image-index=\\\"11\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p>\u5982\u679c\u4e0e\u67d0\u4e00\u7aef\u5b9e\u4f53\u5bf9\u5e94\u7684\u5173\u7cfb\u6a21\u5f0f\u5408\u5e76\uff0c\u5219\u9700\u8981\u5728\u8be5\u5173\u7cfb\u6a21\u5f0f\u7684\u5c5e\u6027\u4e2d\u52a0\u5165\u53e6\u4e00\u4e2a\u5173\u7cfb\u6a21\u5f0f\u7684\u7801\u548c\u8054\u7cfb\u672c\u8eab\u7684\u5c5e\u6027\u3002<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"636\\\" data-height=\\\"361\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-f75270c14548bab4.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/636\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-f75270c14548bab4.png\\\" data-original-width=\\\"636\\\" data-original-height=\\\"361\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"20468\\\" data-image-index=\\\"12\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p><strong>\uff082\uff09\u4e00\u5bf9\u591a\u8054\u7cfb<\/strong><br \/>\n\u4e00\u4e2a 1: n \u8054\u7cfb\u53ef\u4ee5\u8f6c\u6362\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u5173\u7cfb\u6a21\u5f0f\uff0c\u4e5f\u53ef\u4ee5\u4e0e\u4efb\u610f n \u7aef\u5bf9\u5e94\u7684\u5173\u7cfb\u6a21\u5f0f\u5408\u5e76\u3002\u5982\u679c\u8f6c\u6362\u4e3a\u4e00\u4e2a\u72ec\u7acb\u7684\u6a21\u5f0f\uff0c\u5219\u4e0e\u8be5\u8054\u7cfb\u76f8\u8fde\u7684\u5404\u5b9e\u4f53\u7684\u7801\u4ee5\u53ca\u8054\u7cfb\u672c\u8eab\u7684\u5c5e\u6027\u5747\u8f6c\u6362\u4e3a\u5173\u7cfb\u7684\u5c5e\u6027\uff0c\u800c\u5173\u7cfb\u7684\u7801\u4e3a n \u7aef\u5b9e\u4f53\u7684\u7801\u3002\u5982\u679c\u4e0e n \u7aef\u5b9e\u4f53\u5bf9\u5e94\u7684\u5173\u7cfb\u6a21\u5f0f\u5408\u5e76\uff0c\u5219\u9700\u8981\u5728\u8be5\u5173\u7cfb\u6a21\u5f0f\u7684\u5c5e\u6027\u4e2d\u52a0\u51651 \u7aef\u5173\u7cfb\u6a21\u5f0f\u7684\u7801\u548c\u8054\u7cfb\u672c\u8eab\u7684\u5c5e\u6027 \u3002\u8f6c\u6362\u6a21\u5f0f\u672c\u8d28\u4e0a\u4e0e\u4e00\u5bf9\u4e00\u8054\u7cfb\u8f6c\u6362\u6a21\u5f0f\u76f8\u540c\u3002<br \/>\n<strong>\uff083\uff09\u591a\u5bf9\u591a\u8054\u7cfb<\/strong><br \/>\n\u7531\u4e24\u4e2a\u5b9e\u4f53\u7c7b\u4e4b\u95f4\u591a\u5bf9\u591a\u8054\u7cfb\u7ec4\u6210\u7684 E-R \u6a21\u578b\u5411\u5173\u7cfb\u6a21\u578b\u8f6c\u6362\u65f6\uff0c\u5c06\u4e24\u4e2a\u5b9e\u4f53\u7c7b\u548c\u4e00\u4e2a\u8054\u7cfb\u7c7b\u5206\u522b\u8f6c\u6362\u6210\u5173\u7cfb\uff0c\u5b9e\u4f53\u7c7b\u7684\u5c5e\u6027\u5206\u522b\u8f6c\u6362\u6210\u5bf9\u5e94\u5173\u7cfb\u7684\u5c5e\u6027\uff0c\u5176\u6807\u8bc6\u5c5e\u6027\u4e3a\u5176\u5173\u952e\u5b57\uff0c\u7531\u8054\u7cfb\u7c7b\u8f6c\u6362\u5f97\u5230\u7684\u5173\u7cfb\u7684\u5c5e\u6027\u7531\u4e24\u4e2a\u5b9e\u4f53\u7c7b\u7684\u6807\u8bc6\u5c5e\u6027\u548c\u8054\u7cfb\u7c7b\u672c\u8eab\u7684\u5c5e\u6027\u7ec4\u6210\uff0c\u5176\u5173\u952e\u5b57\u662f\u7531\u4e24\u4e2a\u8054\u7cfb\u7684\u5b9e\u4f53\u7c7b\u7684\u6807\u8bc6\u5c5e\u6027\u7ec4\u6210\u3002<br \/>\n<strong>\uff084\uff09\u591a\u5143\u8054\u7cfb<\/strong><br \/>\n\u5b9e\u4f53\u7c7b\u5206\u522b\u8f6c\u6362\u4e3a\u76f8\u5e94\u7684\u5173\u7cfb\uff0c\u4e09\u4e2a\u5b9e\u4f53\u7c7b\u95f4\u7684\u591a\u5143\u8054\u7cfb\u8f6c\u6362\u4e3a\u4ee5\u8be5\u8054\u7cfb\u540d\u4e3a\u5173\u7cfb\u540d\u7684\u5173\u7cfb\uff0c\u5173\u7cfb\u7684\u5c5e\u6027\u7531\u5404\u5b9e\u4f53\u7684\u6807\u8bc6\u5c5e\u6027\u53ca\u5176\u8054\u7cfb\u7684\u5c5e\u6027\u7ec4\u6210\uff0c\u5e76\u4ee5\u5404\u5b9e\u4f53\u7684\u6807\u8bc6\u5c5e\u6027\u4e3a\u5176\u5173\u952e\u5b57\u3002\u4f8b\u5982\u4e0b\u56fe\u6240\u793a\u7684\u90e8\u4ef6\uff08PART\uff09\u3001\u5de5\u7a0b\uff08PROJECT\uff09\u548c\u4f9b\u5e94\u8005\uff08SUPPLIER\uff09\u4e09\u8005\u4e4b\u95f4\u7684\u8054\u7cfb\u4e3a PJS\uff0c\u5176\u5c5e\u6027\u4e3a QTY\u3002\u8f6c\u6362\u65f6\uff0c\u628a PART\u3001 PROJECT\u3001 SUPPLIER \u548c\u8054\u7cfb PJS \u5206\u522b\u8f6c\u6362\u4e3a\u76f8\u5e94\u7684\u5173\u7cfb\uff0c\u5176\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"516\\\" data-height=\\\"236\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-fd479009ff9711b3.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/516\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-fd479009ff9711b3.png\\\" data-original-width=\\\"516\\\" data-original-height=\\\"236\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"26545\\\" data-image-index=\\\"13\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p><strong>\uff085\uff09\u81ea\u8054\u7cfb<\/strong><br \/>\n\u81ea\u8054\u7cfb\u662f\u540c\u4e00\u5b9e\u4f53\u96c6\u7684\u5b9e\u4f53\u95f4\u7684\u8054\u7cfb\u3002\u4f8b\u5982\u5bf9\u4e8e\u804c\u5de5\u5b9e\u4f53\u7c7b\u5185\u90e8\u6709\u9886\u5bfc\u4e0e\u88ab\u9886\u5bfc\u7684\u8054\u7cfb\uff0c\u5728\u90e8\u4ef6\u8fd9\u4e2a\u5b9e\u4f53\u96c6\u7684\u5b9e\u4f53\u4e4b\u95f4\u6709\u7ec4\u6210\u6210\u5206\u4e0e\u7ec4\u6210\u8005\u4e4b\u95f4\u7684\u8054\u7cfb\u7b49\uff0c\u5747\u5c5e\u4e8e<br \/>\n\u5b9e\u4f53\u7c7b\u7684\u81ea\u8054\u7cfb\u3002\u5728\u8fd9\u79cd\u8054\u7cfb\u4e2d\uff0c\u53c2\u4e0e\u8054\u7cfb\u7684\u5b9e\u4f53\u867d\u7136\u6765\u81ea\u540c\u4e00\u5b9e\u4f53\u7c7b\uff0c\u4f46\u6240\u8d77\u7684\u4f5c\u7528\u4e0d\u4e00\u6837\u3002<br \/>\n<strong>\uff086\uff09\u5f31\u5b9e\u4f53\u7c7b\u7684\u8f6c\u6362<\/strong><br \/>\n\u4e00\u4e2a\u5b9e\u4f53\u7c7b\uff0c\u5982\u679c\u5b83\u7684\u5b58\u5728\u4f9d\u8d56\u4e8e\u53e6\u4e00\u5b9e\u4f53\u7c7b\uff0c\u5219\u79f0\u4e4b\u4e3a\u5f31\u5b9e\u4f53\u7c7b\u3002\u4f8b\u5982\u804c\u5de5\u7684\u4eb2\u5c5e\uff08 DEPENDENTS\uff09\u662f\u4f9d\u8d56\u4e8e\u804c\u5de5\uff08 EMPLOYEE\uff09\u5b9e\u4f53\u7c7b\u800c\u5b58\u5728\u7684\uff0c\u56e0\u6b64\u5b9e\u4f53\u96c6\u4eb2\u5c5e\uff08 DEPENDENTS\uff09\u662f\u5f31\u5b9e\u4f53\u7c7b\u3002\u7531\u4e8e\u5f31\u5b9e\u4f53\u7c7b\u4e0d\u80fd\u72ec\u7acb\u5730\u5b58\u5728\uff0c\u800c\u662f\u7531\u5176\u4ed6\u5b9e\u4f53\u6807\u8bc6\u800c\u5b58\u5728\uff0c\u6240\u4ee5\u4e0d\u80fd\u5355\u72ec\u5730\u8f6c\u6362\u6210\u4e00\u4e2a\u5173\u7cfb\u3002<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"461\\\" data-height=\\\"131\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-c133113aad34fbd6.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/461\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-c133113aad34fbd6.png\\\" data-original-width=\\\"461\\\" data-original-height=\\\"131\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"10402\\\" data-image-index=\\\"14\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p>\u5176\u4e2d kinship \u8868\u793a\u804c\u5de5\u4eb2\u5c5e\u4e0e\u804c\u5de5\u7684\u5173\u7cfb\uff0c\u53ef\u4ee5\u53d6\u503c\u4e3a\u201c\u914d\u5076\u201d\u3001\u201c\u513f\u5b50\u201d\u3001\u201c\u5973\u513f\u201d\u7b49\u3002<br \/>\n\u53e6\u5916\uff0c\u8fd8\u67094\u79cd\u60c5\u51b5\u662f\u9700\u8981\u7279\u522b\u6ce8\u610f\u7684 :<\/p>\n<ol>\n<li>\u591a\u503c\u5c5e\u6027\u7684\u5904\u7406\u3002\u5982\u679c ER \u56fe\u4e2d\u67d0\u5b9e\u4f53\u5177\u6709\u4e00\u4e2a\u591a\u503c\u5c5e\u6027\uff0c\u5219\u5e94\u8be5\u8fdb\u884c\u4f18\u5316\uff0c\u628a\u8be5\u5c5e\u6027\u63d0\u5347\u4e3a\u4e00\u4e2a\u5b9e\u4f53\u3002\u6216\u8005\u5728\u8f6c\u5316\u4e3a\u5173\u7cfb\u6a21\u5f0f\u65f6\uff0c\u5c06\u5b9e\u4f53\u7684\u7801\u4e0e\u591a\u503c\u5c5e\u6027\u5355\u72ec\u6784\u6210\u4e00\u4e2a\u5173\u7cfb\u6a21\u5f0f\u3002<\/li>\n<li>BLOB \u578b\u5c5e\u6027\u7684\u5904\u7406\u3002\u5178\u578b\u7684 BLOB \u662f\u4e00\u5f20\u56fe\u7247\u6216\u4e00\u4e2a\u58f0\u97f3\u6587\u4ef6\uff0c\u7531\u4e8e\u5b83\u4eec\u7684\u5bb9\u91cf\u6bd4\u8f83\u5927\uff0c\u5fc5\u987b\u4f7f\u7528\u7279\u6b8a\u7684\u65b9\u5f0f\u6765\u5904\u7406\u3002\u5904\u7406 BLOB \u7684\u4e3b\u8981\u601d\u60f3\u5c31\u662f\u8ba9\u6587\u4ef6\u5904\u7406\u5668 ( \u5982\u6570\u636e\u5e93\u7ba1\u7406\u5668 ) \u4e0d\u53bb\u7406\u4f1a\u6587\u4ef6\u662f\u4ec0\u4e48\uff0c\u800c\u662f\u5173\u5fc3\u5982\u4f55\u53bb\u5904\u7406\u5b83\u3002\u56e0\u6b64\uff0c\u4ece\u4f18\u5316\u7684\u89d2\u5ea6\u8003\u8651\uff0c\u5e94\u91c7\u7528\u7684\u8bbe\u8ba1\u65b9\u6848\u662f\u5c06 BLOB\u5b57\u6bb5\u4e0e\u5173\u7cfb\u7684\u7801\u72ec\u7acb\u4e3a\u4e00\u4e2a\u5173\u7cfb\u6a21\u5f0f\uff1b<\/li>\n<li>\u6d3e\u751f\u5c5e\u6027\u7684\u5904\u7406\u3002\u56e0\u4e3a\u6d3e\u751f\u5c5e\u6027\u53ef\u7531\u5176\u4ed6\u5c5e\u6027\u8ba1\u7b97\u5f97\u5230\uff0c\u56e0\u6b64\uff0c\u5728\u8f6c\u5316\u6210\u5173\u7cfb\u6a21\u5f0f\u65f6\uff0c\u901a\u5e38\u4e0d\u8f6c\u6362\u6d3e\u751f\u5c5e\u6027 \u3002<\/li>\n<li>\u5728\u5bf9\u8c61 &#8211; \u5173\u7cfb\u6570\u636e\u6a21\u578b\u4e2d\uff0c\u8fd9\u91cc\u7684\u5173\u7cfb\u6a21\u5f0f\u5c31\u5bf9\u5e94\u7c7b\uff0c\u5173\u7cfb\u6a21\u5f0f\u7684\u5c5e\u6027\u5c31\u5bf9\u5e94\u7c7b\u7684\u5c5e\u6027\u3002<\/li>\n<\/ol>\n<h3>5.2 \u6570\u636e\u6a21\u578b\u7684\u4f18\u5316<\/h3>\n<p>\u7531 E-R \u56fe\u8868\u793a\u7684\u6982\u5ff5\u6a21\u578b\u8f6c\u6362\u5f97\u5230\u7684\u5173\u7cfb\u6a21\u578b\u7ecf\u8fc7\u89c4\u8303\u5316\u4ee5\u540e\uff0c\u57fa\u672c\u4e0a\u53ef\u4ee5\u53cd\u6620\u4e00\u4e2a\u4f01\u4e1a\u6570\u636e\u7684\u5185\u5728\u8054\u7cfb\uff0c\u4f46\u4e0d\u4e00\u5b9a\u80fd\u6ee1\u8db3\u5e94\u7528\u7684\u5168\u90e8\u9700\u8981\u548c\u7cfb\u7edf\u8981\u6c42\uff0c\u56e0\u6b64\uff0c\u8fd8\u5fc5\u987b\u6839\u636e\u9700\u6c42\u5206\u6790\u5bf9\u6a21\u578b\u505a\u8fdb\u4e00\u6b65\u7684\u6539\u5584\u548c\u8c03\u6574\uff0c\u5176\u5185\u5bb9\u4e3b\u8981\u662f\u6539\u5584\u6570\u636e\u5e93\u7684\u6027\u80fd\u548c\u8282\u7701\u5b58\u50a8\u7a7a\u95f4\u4e24\u4e2a\u65b9\u9762\u3002<\/p>\n<h4>5.2.1 \u6539\u5584\u6570\u636e\u5e93\u6027\u80fd\u7684\u8003\u8651<\/h4>\n<p>\u67e5\u8be2\u901f\u5ea6\u662f\u5173\u7cfb\u6570\u636e\u5e93\u5e94\u7528\u4e2d\u5f71\u54cd\u6027\u80fd\u7684\u5173\u952e\u95ee\u9898\uff0c\u5fc5\u987b\u5728\u6570\u636e\u5e93\u7684\u903b\u8f91\u8bbe\u8ba1\u548c\u7269\u7406\u8bbe\u8ba1\u4e2d\u8ba4\u771f\u52a0\u4ee5\u8003\u8651\uff0c\u7279\u522b\u662f\u90a3\u4e9b\u5bf9\u54cd\u5e94\u65f6\u95f4\u8981\u6c42\u8f83\u82db\u523b\u7684\u5e94\u7528\uff0c\u5e94\u4e88\u4ee5\u7279\u522b\u6ce8\u610f\u3002<br \/>\n\u5c31\u6570\u636e\u5e93\u7684\u903b\u8f91\u8bbe\u8ba1\u800c\u8bba\uff0c\u53ef\u4ece\u4e0b\u5217\u51e0\u4e2a\u65b9\u9762\u63d0\u9ad8\u67e5\u8be2\u7684\u901f\u5ea6\u3002<br \/>\n<strong>\uff081\uff09\u51cf\u5c11\u8fde\u63a5\u8fd0\u7b97<\/strong><br \/>\n\u8fde\u63a5\u8fd0\u7b97\u5bf9\u5173\u7cfb\u6570\u636e\u5e93\u7684\u67e5\u8be2\u901f\u5ea6\u6709\u7740\u91cd\u8981\u7684\u5f71\u54cd\uff0c\u8fde\u63a5\u7684\u5173\u7cfb\u8d8a\u591a\uff0c\u53c2\u4e0e\u8fde\u63a5\u7684\u5173\u7cfb\u8d8a\u5927\uff0c\u5f00\u9500\u4e5f\u8d8a\u5927\uff0c\u56e0\u800c\u67e5\u8be2\u901f\u5ea6\u4e5f\u8d8a\u6162\u3002\u5bf9\u4e8e\u4e00\u4e9b\u5e38\u7528\u7684\u3001\u6027\u80fd\u8981\u6c42\u8f83\u9ad8\u7684\u6570\u636e\u5e93\u67e5\u8be2\uff0c\u6700\u597d\u662f\u4e00\u5143\u67e5\u8be2\uff0c\u4f46\u8fd9\u4e0e\u89c4\u8303\u5316\u7684\u8981\u6c42\u76f8\u77db\u76fe\u3002\u6709\u65f6\u4e3a\u4e86\u4fdd\u8bc1\u6027\u80fd\uff0c\u5f80\u5f80\u4e0d\u5f97\u4e0d\u727a\u7272\u89c4\u8303\u5316\u8981\u6c42\uff0c\u628a\u89c4\u8303\u5316\u7684\u5173\u7cfb\u518d\u5408\u5e76\u8d77\u6765\uff0c\u79f0\u4e4b\u4e3a\u9006\u89c4\u8303\u5316\u3002\u5f53\u7136\uff0c\u8fd9\u6837\u505a\u4f1a<br \/>\n\u5f15\u8d77\u66f4\u65b0\u5f02\u5e38\u3002\u603b\u4e4b\uff0c\u9006\u89c4\u8303\u5316\u6709\u5f97\u6709\u5931\uff0c\u8bbe\u8ba1\u8005\u53ef\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u6743\u8861\u3002<br \/>\n<strong>\uff082\uff09\u51cf\u5c0f\u5173\u7cfb\u5927\u5c0f\u53ca\u6570\u636e\u91cf<\/strong><br \/>\n\u88ab\u67e5\u8be2\u7684\u5173\u7cfb\u7684\u5927\u5c0f\u5bf9\u67e5\u8be2\u901f\u5ea6\u5f71\u54cd\u8f83\u5927\u3002\u4e3a\u4e86\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\uff0c\u53ef\u4ee5\u91c7\u7528\u6c34\u5e73\u5206\u5272\u6216\u5782\u76f4\u5206\u5272\u7b49\u65b9\u6cd5\u628a\u4e00\u4e2a\u5173\u7cfb\u5206\u6210\u51e0\u4e2a\u5173\u7cfb\uff0c\u4f7f\u6bcf\u4e2a\u5173\u7cfb\u7684\u6570\u636e\u91cf\u51cf\u5c11\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u5927\u5b66\u4e2d\u6709\u5173\u5b66\u751f\u7684\u6570\u636e\uff0c\u65e2\u53ef\u4ee5\u628a\u5168\u6821\u5b66\u751f\u7684\u6570\u636e\u96c6\u4e2d\u5728\u4e00\u4e2a\u5173\u7cfb\u4e2d\uff0c\u4e5f\u53ef\u4ee5\u7528\u6c34\u5e73\u5206\u5272\u7684\u65b9\u6cd5\uff0c\u5206\u7cfb\u5efa\u7acb\u5173\u7cfb\uff0c\u4ece\u800c\u51cf\u5c11\u4e86\u6bcf\u4e2a\u5173\u7cfb\u7684\u5143\u7ec4\u6570\u3002\u524d\u8005\u5bf9\u5168\u6821\u8303\u56f4\u5185\u7684\u67e5\u8be2\u8f83\u65b9\u4fbf\uff0c\u540e\u8005\u5219\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u5bf9\u6307\u5b9a\u7cfb\u7684\u67e5\u8be2\u901f\u5ea6\u3002\u4e5f\u53ef\u91c7\u7528\u5782\u76f4\u5206\u5272\u7684\u65b9\u6cd5\uff0c\u628a\u5e38\u7528\u6570\u636e\u4e0e\u975e\u5e38\u7528\u6570\u636e\u5206\u5f00\uff0c\u4ee5\u63d0\u9ad8\u5e38\u7528\u6570\u636e\u7684\u67e5\u8be2\u901f\u5ea6\u3002\u4f8b\u5982\uff0c\u9ad8\u6821\u4e2d\u6559\u804c\u5de5\u6863\u6848\uff0c\u5c5e\u6027\u5f88\u591a\uff0c\u6709\u4e9b\u9700\u7ecf\u5e38\u67e5\u8be2\uff0c\u6709\u4e9b\u5219\u5f88\u5c11\u67e5\u8be2\uff0c\u5982\u679c\u653e\u5728\u4e00\u8d77\uff0c\u5219\u5173\u7cfb\u7684\u6570\u636e\u91cf\u5c31\u4f1a\u5f88\u5927\uff0c\u5f71\u54cd\u67e5\u8be2\u901f\u5ea6\uff0c\u56e0\u6b64\u628a\u5e38\u7528\u5c5e\u6027\u548c\u975e\u5e38\u7528\u5c5e\u6027\u5206\u5f00\uff0c\u5c31\u53ef\u63d0\u9ad8\u5bf9\u5e38\u7528\u5c5e\u6027\u7684\u67e5\u8be2\u901f\u5ea6\u3002<br \/>\n<strong>\uff083\uff09\u5c3d\u91cf\u4f7f\u7528\u5feb\u7167<\/strong><br 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DBMS\uff0c\u5982 Oracle\u3001 MS SQL Server \u7b49\u652f\u6301\u5feb\u7167\u3002\u5bf9\u4e0d\u652f\u6301\u5feb\u7167\u7684 DBMS\uff0c\u7528\u6237\u4e5f\u53ef\u4ee5\u628a\u9700\u8981\u4f5c\u4e3a\u5b9e\u5173\u7cfb\u4f7f\u7528\u7684\u5bfc\u51fa\u5173\u7cfb\u4f5c\u4e3a\u4e00\u4e2a\u72ec\u7acb\u5173\u7cfb\u5b58\u4e8e\u6570\u636e\u5e93\u4e2d\uff0c\u4f46\u8fd9\u79cd\u505a\u6cd5\u53ea\u80fd\u4f9b\u67e5\u8be2\u4f7f\u7528\uff0c\u5bf9\u5b83\u4eec\u7684\u5237\u65b0\u53ca\u7ba1\u7406\u7531\u7528\u6237\u8d1f\u8d23\u3002<\/p>\n<h4>5.2.2 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\u6240\u793a\u3002<\/p>\n<div class=\\\"image-package\\\">\n<div class=\\\"image-container\\\">\n<div class=\\\"image-container-fill\\\"><\/div>\n<div class=\\\"image-view\\\" data-width=\\\"803\\\" data-height=\\\"383\\\"><img class=\\\"\\\" src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-241085243ff147bc.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/803\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/3386108-241085243ff147bc.png\\\" data-original-width=\\\"803\\\" data-original-height=\\\"383\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"59161\\\" data-image-index=\\\"15\\\" \/><\/div>\n<\/div>\n<div class=\\\"image-caption\\\"><\/div>\n<\/div>\n<p>\u7531\u4e8e\u4e0d\u540c\u7684 DBMS 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