{"id":74509,"date":"2024-10-15T22:33:17","date_gmt":"2024-10-15T14:33:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/74509\/"},"modified":"2024-10-15T22:33:17","modified_gmt":"2024-10-15T14:33:17","slug":"mysql-json%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e5%a6%82%e4%bd%95%e6%93%8d%e4%bd%9c%ef%bc%9f%e9%80%99%e8%a3%a1%e5%91%8a%e8%a8%b4%e4%bd%a0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/74509\/","title":{"rendered":"MySQL JSON\u6578\u64da\u985e\u578b\u5982\u4f55\u64cd\u4f5c\uff1f\u9019\u88e1\u544a\u8a34\u4f60~"},"content":{"rendered":"<h1 id=\"mysql-json%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e5%a6%82%e4%bd%95%e6%93%8d%e4%bd%9c%ef%bc%9f%e9%80%99%e8%a3%a1%e5%91%8a%e8%a8%b4%e4%bd%a0-duELgbLzeh\">MySQL JSON\u6578\u64da\u985e\u578b\u5982\u4f55\u64cd\u4f5c\uff1f\u9019\u88e1\u544a\u8a34\u4f60~<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u7ba1\u7406\u4e2d\uff0cJSON\uff08JavaScript Object Notation\uff09\u5df2\u6210\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u6578\u64da\u683c\u5f0f\uff0c\u56e0\u5176\u6613\u65bc\u95b1\u8b80\u548c\u7de8\u5beb\u800c\u53d7\u5230\u5ee3\u6cdb\u4f7f\u7528\u3002MySQL\u5f9e5.7\u7248\u672c\u958b\u59cb\u652f\u6301JSON\u6578\u64da\u985e\u578b\uff0c\u9019\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u66f4\u9748\u6d3b\u5730\u8655\u7406\u7d50\u69cb\u5316\u548c\u975e\u7d50\u69cb\u5316\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728MySQL\u4e2d\u64cd\u4f5cJSON\u6578\u64da\u985e\u578b\uff0c\u5305\u62ec\u5275\u5efa\u3001\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u522a\u9664JSON\u6578\u64da\u3002<\/p>\n<h2 id=\"1-%e5%89%b5%e5%bb%bajson%e6%95%b8%e6%93%9a-duELgbLzeh\">1. \u5275\u5efaJSON\u6578\u64da<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u5275\u5efa\u4e00\u500b\u5305\u542bJSON\u6578\u64da\u7684\u8868\u683c\u975e\u5e38\u7c21\u55ae\u3002\u9996\u5148\uff0c\u6211\u5011\u9700\u8981\u5b9a\u7fa9\u4e00\u500b\u5305\u542bJSON\u6578\u64da\u985e\u578b\u7684\u5217\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT AUTO_INCREMENT PRIMARY KEY,\n    name VARCHAR(100),\n    data JSON\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba\u201cusers\u201d\u7684\u8868\u683c\uff0c\u5176\u4e2d\u201cdata\u201d\u5217\u7684\u6578\u64da\u985e\u578b\u70baJSON\u3002\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u53ef\u4ee5\u63d2\u5165JSON\u6578\u64da\uff1a<\/p>\n<pre><code>INSERT INTO users (name, data) VALUES \n('Alice', '{\"age\": 30, \"city\": \"Hong Kong\"}'),\n('Bob', '{\"age\": 25, \"city\": \"Taipei\"}');<\/code><\/pre>\n<h2 id=\"2-%e6%9f%a5%e8%a9%a2json%e6%95%b8%e6%93%9a-duELgbLzeh\">2. \u67e5\u8a62JSON\u6578\u64da<\/h2>\n<p>\u67e5\u8a62JSON\u6578\u64da\u6642\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528MySQL\u63d0\u4f9b\u7684\u591a\u7a2e\u51fd\u6578\u4f86\u63d0\u53d6\u548c\u64cd\u4f5cJSON\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"2-1-%e7%8d%b2%e5%8f%96%e6%95%b4%e5%80%8bjson%e6%95%b8%e6%93%9a-duELgbLzeh\">2.1 \u7372\u53d6\u6574\u500bJSON\u6578\u64da<\/h3>\n<pre><code>SELECT data FROM users WHERE name = 'Alice';<\/code><\/pre>\n<h3 id=\"2-2-%e7%8d%b2%e5%8f%96json%e4%b8%ad%e7%9a%84%e7%89%b9%e5%ae%9a%e5%ad%97%e6%ae%b5-duELgbLzeh\">2.2 \u7372\u53d6JSON\u4e2d\u7684\u7279\u5b9a\u5b57\u6bb5<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u7372\u53d6\u201cage\u201d\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u201cJSON_EXTRACT\u201d\u51fd\u6578\uff1a<\/p>\n<pre><code>SELECT JSON_EXTRACT(data, '$.age') AS age FROM users WHERE name = 'Alice';<\/code><\/pre>\n<h3 id=\"2-3-%e4%bd%bf%e7%94%a8-%e6%93%8d%e4%bd%9c%e7%ac%a6-duELgbLzeh\">2.3 \u4f7f\u7528\u201c-&gt;\u201d\u64cd\u4f5c\u7b26<\/h3>\n<p>MySQL\u9084\u652f\u6301\u4f7f\u7528\u201c-&gt;\u201d\u64cd\u4f5c\u7b26\u4f86\u7c21\u5316JSON\u5b57\u6bb5\u7684\u63d0\u53d6\uff1a<\/p>\n<pre><code>SELECT data-&gt;'$.age' AS age FROM users WHERE name = 'Alice';<\/code><\/pre>\n<h2 id=\"3-%e6%9b%b4%e6%96%b0json%e6%95%b8%e6%93%9a-duELgbLzeh\">3. \u66f4\u65b0JSON\u6578\u64da<\/h2>\n<p>\u66f4\u65b0JSON\u6578\u64da\u540c\u6a23\u53ef\u4ee5\u4f7f\u7528\u201cJSON_SET\u201d\u51fd\u6578\u3002\u5047\u8a2d\u6211\u5011\u60f3\u8981\u66f4\u65b0Alice\u7684\u57ce\u5e02\u4fe1\u606f\uff1a<\/p>\n<pre><code>UPDATE users \nSET data = JSON_SET(data, '$.city', 'Shenzhen') \nWHERE name = 'Alice';<\/code><\/pre>\n<h2 id=\"4-%e5%88%aa%e9%99%a4json%e6%95%b8%e6%93%9a-duELgbLzeh\">4. \u522a\u9664JSON\u6578\u64da<\/h2>\n<p>\u5982\u679c\u9700\u8981\u522a\u9664JSON\u4e2d\u7684\u67d0\u500b\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u201cJSON_REMOVE\u201d\u51fd\u6578\u3002\u4f8b\u5982\uff0c\u522a\u9664Alice\u7684\u201cage\u201d\u5b57\u6bb5\uff1a<\/p>\n<pre><code>UPDATE users \nSET data = JSON_REMOVE(data, '$.age') \nWHERE name = 'Alice';<\/code><\/pre>\n<h2 id=\"5-json%e6%95%b8%e6%93%9a%e7%9a%84%e5%84%aa%e5%8b%a2-duELgbLzeh\">5. JSON\u6578\u64da\u7684\u512a\u52e2<\/h2>\n<p>\u4f7f\u7528JSON\u6578\u64da\u985e\u578b\u7684\u4e3b\u8981\u512a\u52e2\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u9748\u6d3b\u6027\uff1a\u53ef\u4ee5\u5b58\u5132\u7d50\u69cb\u5316\u548c\u975e\u7d50\u69cb\u5316\u6578\u64da\u3002<\/li>\n<li>\u6613\u65bc\u64f4\u5c55\uff1a\u53ef\u4ee5\u96a8\u6642\u6dfb\u52a0\u6216\u522a\u9664\u5b57\u6bb5\uff0c\u800c\u4e0d\u9700\u8981\u4fee\u6539\u8868\u7d50\u69cb\u3002<\/li>\n<li>\u9ad8\u6548\u67e5\u8a62\uff1aMySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u9ad8\u6548\u67e5\u8a62\u548c\u64cd\u4f5cJSON\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-duELgbLzeh\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7684JSON\u6578\u64da\u985e\u578b\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u4f86\u8655\u7406\u5404\u7a2e\u6578\u64da\u9700\u6c42\u3002\u901a\u904e\u672c\u6587\u7684\u4ecb\u7d39\uff0c\u60a8\u61c9\u8a72\u80fd\u5920\u719f\u7df4\u5730\u5275\u5efa\u3001\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u522a\u9664JSON\u6578\u64da\u3002\u7121\u8ad6\u60a8\u662f\u5728\u958b\u767c\u61c9\u7528\u7a0b\u5e8f\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u638c\u63e1\u9019\u4e9b\u64cd\u4f5c\u90fd\u5c07\u5927\u5927\u63d0\u9ad8\u60a8\u7684\u5de5\u4f5c\u6548\u7387\u3002\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u9805\u76ee\u3002\u9019\u4e9b\u670d\u52d9\u80fd\u5920\u70ba\u60a8\u7684\u6578\u64da\u7ba1\u7406\u63d0\u4f9b\u5f37\u5927\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728MySQL\u4e2d\u64cd\u4f5cJSON\u6578\u64da\u985e\u578b\uff0c\u638c\u63e1\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u7ba1\u7406JSON\u6578\u64da\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-74509","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74509","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=74509"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74509\/revisions"}],"predecessor-version":[{"id":74510,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74509\/revisions\/74510"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=74509"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=74509"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=74509"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}