{"id":2041,"date":"2020-07-29T23:22:48","date_gmt":"2020-07-29T15:22:48","guid":{"rendered":"http:\/\/39.97.231.10\/?p=2041"},"modified":"2020-07-29T23:22:48","modified_gmt":"2020-07-29T15:22:48","slug":"mysql%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b-json","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=2041","title":{"rendered":"MySQL\u6570\u636e\u7c7b\u578b-JSON"},"content":{"rendered":"<div>\n<div>\n<div>\nMySQL 5.7.8 \u7248\u672c\u5f00\u59cb\u652f\u6301JSON\u7c7b\u578b\uff0c\u5728JSON\u7c7b\u578b\u652f\u6301\u4e4b\u524d\uff0c\u901a\u5e38\u4f7f\u7528\u5b57\u7b26\u4e32\u7c7b\u578b\u5b58\u50a8JSON\u6570\u636e\uff0c\u76f8\u5bf9\u4e8e\u5b57\u7b26\u4e32\uff0c\u539f\u751f\u7684JSON\u7c7b\u578b\u80fd\u591f\u5bf9\u6570\u636e\u7684\u6709\u6548\u6027\u8fdb\u884c\u9a8c\u8bc1\u3002JSON\u7c7b\u578b\u72ec\u7279\u7684\u5185\u90e8\u5b58\u50a8\u683c\u5f0f\u548c\u7d22\u5f15\uff0c\u80fd\u591f\u66f4\u52a0\u9ad8\u6548\u7684\u8bbf\u95eeJSON\u6570\u636e\u8282\u70b9\u3002\u53e6\u5916MySQL\u63d0\u4f9b\u4e30\u5bcc\u7684JSON\u7c7b\u578b\u76f8\u5173\u51fd\u6570\uff0cJSON\u6570\u636e\u7684\u67e5\u8be2\u4e0e\u64cd\u4f5c\u66f4\u52a0\u4fbf\u6377\u3002<\/p>\n<h4>1\u3001JSON\u7c7b\u578b\u4f18\u52bf\uff1a<\/h4>\n<ul>\n<li>\u81ea\u52a8\u9a8c\u8bc1JSON\u6570\u636e\u7684\u6709\u6548\u6027\uff0c\u4e0d\u7b26\u5408JSON\u89c4\u8303\u7684\u6570\u636e\u5c06\u4f1a\u63d0\u793a\u62a5\u9519\u3002<\/li>\n<li>\u4f18\u5316\u5b58\u50a8\u683c\u5f0f\uff0cJSON\u7c7b\u578b\u5728\u5b58\u50a8\u65f6\u88ab\u8f6c\u6362\u6210\u4e00\u79cd\u5185\u90e8\u7684\u683c\u5f0f\uff0c\u80fd\u591f\u5feb\u901f\u5730\u8bbf\u95eeJSON\u6587\u6863\u6570\u636e\u7684\u5143\u7d20\u3002<\/li>\n<li>\u4e30\u5bcc\u7684JSON\u7c7b\u578b\u76f8\u5173\u51fd\u6570\uff0cJSON\u6570\u636e\u64cd\u4f5c\u66f4\u52a0\u4fbf\u6377\u3002<\/li>\n<\/ul>\n<h4>2\u3001\u5e38\u7528\u7684JSON\u7c7b\u578b\uff1a<\/h4>\n<ul>\n<li>JSON\u6570\u7ec4\uff0c\u5982\uff1a[1,2]<\/li>\n<li>JSON\u5bf9\u8c61\uff0c\u5982\uff1a{\\&#8221;key\\&#8221;:\\&#8221;value\\&#8221;}<\/li>\n<\/ul>\n<p>\u793a\u4f8b\uff1a<br \/>\n\u521b\u5efa\u4e00\u4e2a\u5305\u542bJSON\u7c7b\u578b\u7684\u8868\uff1a<br \/>\ncreate table tb(c json);<br \/>\n\u63d2\u5165JSON\u6570\u636e\uff1a<br \/>\ninsert into tb values(\\'[1,2]\\&#8217;);<br \/>\ninsert into tb values(\\'{\\&#8221;key\\&#8221;:\\&#8221;value\\&#8221;}\\&#8217;);<br \/>\n\u67e5\u8be2\u8868\u4e2dJSON\u6570\u636e\u7684\u503c\uff1a<br \/>\nselect c-&gt;\\&#8221;$.key\\&#8221; from tb;<br \/>\n\u67e5\u51fa\u6765\u7684\u7ed3\u679c\u662f\u5e26\u5f15\u53f7\u7684\uff0c\u60f3\u53bb\u9664\u5f15\u53f7\u7684\u8bdd\uff0c\u628a-&gt;\u6362\u6210-&gt;&gt;\uff0c\u5982\u4e0b\uff1a<br \/>\nselect c-&gt;&gt;\\&#8221;$.key\\&#8221; from tb;<\/p>\n<h4>3\u3001JSON\u51fd\u6570\uff1a<\/h4>\n<ul>\n<li>JSON_TYPE()<\/li>\n<li>JSON_VALID()<\/li>\n<li>JSON_ARRAY()<\/li>\n<li>JSON_OBJECT()<\/li>\n<li>JSON_MERGE()<\/li>\n<li>JSON_EXTRACT()<\/li>\n<li>JSON_SET()<\/li>\n<li>JSON_INSERT()<\/li>\n<li>JSON_REPLACE()<\/li>\n<li>JSON_REMOVE()<\/li>\n<li>JSON_SEARCH()<\/li>\n<li>JSON_CONTAINS_PATH()<\/li>\n<\/ul>\n<h5>3.1 JSON_TYPE()<\/h5>\n<p>JSON_TYPE() \u51fd\u6570\u8fd4\u56de JSON\u6570\u636e\u7684\u7c7b\u578b\uff0cJSON\u6570\u7ec4\u8fd4\u56deARRAY\uff0cJSON\u5bf9\u8c61\u8fd4\u56deOBJECT\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>mysql&gt; select JSON_TYPE(\\'[1,2]\\');\n+--------------------+\n| JSON_TYPE(\\'[1,2]\\') |\n+--------------------+\n| ARRAY\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+--------------------+\nmysql&gt; select JSON_TYPE(\\'{\\\"key\\\":\\\"value\\\"}\\');\n+------------------------------+\n| JSON_TYPE(\\'{\\\"key\\\":\\\"value\\\"}\\') |\n+------------------------------+\n| OBJECT\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+------------------------------+\n<\/pre>\n<h5>3.2 JSON_VALID()<\/h5>\n<p>JSON_VALID() \u51fd\u6570\u7528\u4e8e\u5224\u65ad\u6570\u636e\u662f\u5426\u4e3a\u6709\u6548\u7684JSON\u6570\u636e\uff0c\u6709\u6548\u8fd4\u56de1\uff0c\u65e0\u6548\u8fd4\u56de0\u3002\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>mysql&gt; select JSON_VALID(\\'[\\\"abc\\\"]\\');\n+-----------------------+\n| JSON_VALID(\\'[\\\"abc\\\"]\\') |\n+-----------------------+\n|\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1 |\n+-----------------------+\nmysql&gt; select JSON_VALID(\\'{abc}\\');\n+---------------------+\n| JSON_VALID(\\'{abc}\\') |\n+---------------------+\n|\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0 |\n+---------------------+\n<\/pre>\n<h5>3.3 JSON_ARRAY()<\/h5>\n<p>JSON_ARRAY()\u51fd\u6570\u7528\u4e8e\u6784\u9020\u4e00\u4e2aJSON\u6570\u7ec4\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SELECT JSON_ARRAY(\\'a\\', 1, NOW());\n+----------------------------------------+\n| JSON_ARRAY(\\'a\\', 1, NOW())\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+----------------------------------------+\n| [\\\"a\\\", 1, \\\"2020-02-18 19:09:41.000000\\\"] |\n+----------------------------------------+\n<\/pre>\n<h5>3.4 JSON_OBJECT()<\/h5>\n<p>JSON_OBJECT()\u51fd\u6570\u7528\u4e8e\u6784\u9020\u4e00\u4e2aJSON\u5bf9\u8c61\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SELECT JSON_OBJECT(\\'key1\\', 1, \\'key2\\', \\'abc\\');\n+---------------------------------------+\n| JSON_OBJECT(\\'key1\\', 1, \\'key2\\', \\'abc\\') |\n+---------------------------------------+\n| {\\\"key1\\\": 1, \\\"key2\\\": \\\"abc\\\"}\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+---------------------------------------+\n<\/pre>\n<h5>3.5 JSON_MERGE()<\/h5>\n<p>JSON_MERGE()\u51fd\u6570\u7528\u4e8e\u5408\u5e76\u4e24\u4e2aJSON\u6570\u636e\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SELECT JSON_MERGE(\\'[\\\"a\\\", 1]\\', \\'{\\\"key\\\": \\\"value\\\"}\\');\n+--------------------------------------------+\n| JSON_MERGE(\\'[\\\"a\\\", 1]\\', \\'{\\\"key\\\": \\\"value\\\"}\\') |\n+--------------------------------------------+\n| [\\\"a\\\", 1, {\\\"key\\\": \\\"value\\\"}]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+--------------------------------------------+\n<\/pre>\n<h5>3.6 JSON_EXTRACT()<\/h5>\n<p>JSON_EXTRACT()\u51fd\u6570\u7528\u4e8e\u7cbe\u51c6\u67e5\u8be2JSON\u6570\u636e\u4e2d\u7684\u67d0\u4e2a\u5143\u7d20\uff0c\u6bd4\u5982\u83b7\u53d6\u67d0\u4e2akey\u5bf9\u5e94\u7684value\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SELECT JSON_EXTRACT(\\'{\\\"id\\\": 14, \\\"name\\\": \\\"Aztalan\\\"}\\', \\'$.name\\');\n+---------------------------------------------------------+\n| JSON_EXTRACT(\\'{\\\"id\\\": 14,\\\"name\\\":\\\"Aztalan\\\"}\\', \\'$.name\\') |\n+---------------------------------------------------------+\n| \\\"Aztalan\\\"\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+---------------------------------------------------------+\n<\/pre>\n<h5>3.7 JSON_SET()<\/h5>\n<p>JSON_SET()\u51fd\u6570\u7528\u4e8e\u8bbe\u7f6eJSON\u4e2d\u7684\u67d0\u4e2a\u503c\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SELECT JSON_SET(\\'[\\\"x\\\",\\\"y\\\"]\\', \\'$[0]\\', \\'a\\');\n+------------------------------------+\n| JSON_SET(\\'[\\\"x\\\",\\\"y\\\"]\\', \\'$[0]\\', \\'a\\') |\n+------------------------------------+\n| [\\\"a\\\", \\\"y\\\"]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+------------------------------------+\n<\/pre>\n<h5>3.8 JSON_INSERT()<\/h5>\n<p>JSON_INSERT()\u51fd\u6570\u7528\u4e8e\u5728JSON\u6570\u636e\u4e2d\u63d2\u5165\u65b0\u7684\u503c\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SELECT JSON_INSERT(\\'[\\\"x\\\",\\\"y\\\"]\\', \\'$[2]\\', \\'a\\');\n+---------------------------------------+\n| JSON_INSERT(\\'[\\\"x\\\",\\\"y\\\"]\\', \\'$[2]\\', \\'a\\') |\n+---------------------------------------+\n| [\\\"x\\\", \\\"y\\\", \\\"a\\\"]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+---------------------------------------+\n<\/pre>\n<h5>3.9 JSON_REPLACE()<\/h5>\n<p>JSON_REPLACE()\u51fd\u6570\u7528\u4e8e\u66ff\u6362JSON\u6570\u636e\u4e2d\u7684\u67d0\u4e2a\u503c\uff0c\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SELECT JSON_REPLACE(\\'[\\\"x\\\",\\\"y\\\"]\\', \\'$[0]\\', \\'a\\');\n+----------------------------------------+\n| JSON_REPLACE(\\'[\\\"x\\\",\\\"y\\\"]\\', \\'$[0]\\', \\'a\\') |\n+----------------------------------------+\n| [\\\"a\\\", \\\"y\\\"]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+----------------------------------------+\n<\/pre>\n<h5>3.10 JSON_REMOVE()<\/h5>\n<p>JSON_REMOVE()\u51fd\u6570\u7528\u4e8e\u79fb\u9664JSON\u6570\u636e\u4e2d\u7684\u67d0\u4e2a\u503c\uff0c\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SELECT JSON_REMOVE(\\'[\\\"x\\\",\\\"y\\\"]\\', \\'$[0]\\');\n+----------------------------------+\n| JSON_REMOVE(\\'[\\\"x\\\",\\\"y\\\"]\\', \\'$[0]\\') |\n+----------------------------------+\n| [\\\"y\\\"]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |\n+----------------------------------+\n<\/pre>\n<h5>3.11 JSON_SEARCH()<\/h5>\n<p>JSON_SEARCH()\u51fd\u6570\u7528\u4e8e\u641c\u7d22JSON\u6570\u636e\u4e2d\u7684\u67d0\u4e2a\u503c\uff0c\u53c2\u6570one\u8868\u793a\u53ea\u641c\u7d22\u7b26\u5408\u6761\u4ef6\u7684\u4e00\u4e2a\u7ed3\u679c\uff0call\u8868\u793a\u641c\u7d22\u6240\u6709\u7ed3\u679c\uff0c\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SET @j = \\'[\\\"abc\\\", [{\\\"k\\\": \\\"10\\\"}, \\\"def\\\"], {\\\"x\\\":\\\"abc\\\"}, {\\\"y\\\":\\\"bcd\\\"}]\\';\nQuery OK, 0 rows affected (0.00 sec)\nmysql&gt; SELECT JSON_SEARCH(@j, \\'one\\', \\'abc\\');\n+-------------------------------+\n| JSON_SEARCH(@j, \\'one\\', \\'abc\\') |\n+-------------------------------+\n| \\\"$[0]\\\"                        |\n+-------------------------------+\n1 row in set (0.00 sec)\nmysql&gt; SELECT JSON_SEARCH(@j, \\'all\\', \\'abc\\');\n+-------------------------------+\n| JSON_SEARCH(@j, \\'all\\', \\'abc\\') |\n+-------------------------------+\n| [\\\"$[0]\\\", \\\"$[2].x\\\"]            |\n+-------------------------------+\n1 row in set (0.00 sec)\n<\/pre>\n<h5>3.12 JSON_CONTAINS_PATH()<\/h5>\n<p>JSON_CONTAINS_PATH()\u51fd\u6570\u7528\u4e8e\u641c\u7d22\u7b26\u5408\u6761\u4ef6\u7684JSON\u8def\u5f84\uff0c\u5982\u679c\u641c\u7d22\u5230\u7b26\u5408\u6761\u4ef6\u7684\u8def\u5f84\uff0c\u8fd4\u56de1\uff0c\u5426\u5219\u8fd4\u56de0\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<pre>mysql&gt; SET @j = \\'{\\\"a\\\": 1, \\\"b\\\": 2, \\\"c\\\": {\\\"d\\\": 4}}\\';\nQuery OK, 0 rows affected (0.00 sec)\nmysql&gt; SELECT JSON_CONTAINS_PATH(@j, \\'one\\', \\'$.a\\', \\'$.e\\') as t;\n+------+\n| t    |\n+------+\n|    1 |\n+------+\n1 row in set (0.00 sec)\nmysql&gt; SELECT JSON_CONTAINS_PATH(@j, \\'all\\', \\'$.a\\', \\'$.e\\') as t;\n+------+\n| t    |\n+------+\n|    0 |\n+------+\n1 row in set (0.00 sec)\nmysql&gt; SELECT JSON_CONTAINS_PATH(@j, \\'one\\', \\'$.c.d\\') as t;\n+------+\n| t    |\n+------+\n|    1 |\n+------+\n1 row in set (0.00 sec)\nmysql&gt; SELECT JSON_CONTAINS_PATH(@j, \\'one\\', \\'$.a.d\\') as t;\n+------+\n| t    |\n+------+\n|    0 |\n+------+\n1 row in set (0.00 sec)<\/pre>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>MySQL 5.7.8 \u7248\u672c\u5f00\u59cb\u652f\u6301JSON\u7c7b\u578b\uff0c\u5728JSON\u7c7b\u578b\u652f\u6301\u4e4b\u524d\uff0c\u901a\u5e38\u4f7f\u7528\u5b57\u7b26\u4e32\u7c7b\u578b\u5b58\u50a8JSON\u6570\u636e\uff0c &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=2041\"> <span class=\"screen-reader-text\">MySQL\u6570\u636e\u7c7b\u578b-JSON<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[90,88],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"MySQL 5.7.8 \u7248\u672c\u5f00\u59cb\u652f\u6301JSON\u7c7b\u578b\uff0c\u5728JSON\u7c7b\u578b\u652f\u6301\u4e4b\u524d\uff0c\u901a\u5e38\u4f7f\u7528\u5b57\u7b26\u4e32\u7c7b\u578b\u5b58\u50a8JSON\u6570\u636e\uff0c&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/2041"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2041"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/2041\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2041"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2041"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}