{"id":190036,"date":"2024-11-12T09:14:19","date_gmt":"2024-11-12T01:14:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/190036\/"},"modified":"2024-11-12T09:14:21","modified_gmt":"2024-11-12T01:14:21","slug":"%e7%8e%a9%e6%8a%93mysql%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%81sql%e5%91%bd%e4%bb%a4%e5%a4%a7%e5%85%a8%ef%bc%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/190036\/","title":{"rendered":"\u73a9\u6293MYSQL\u6578\u64da\u5eab\uff01SQL\u547d\u4ee4\u5927\u5168\uff01"},"content":{"rendered":"<h1 id=\"%e7%8e%a9%e6%8a%93mysql%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%81sql%e5%91%bd%e4%bb%a4%e5%a4%a7%e5%85%a8%ef%bc%81-ktYjVFVcMf\">\u73a9\u6293MYSQL\u6578\u64da\u5eab\uff01SQL\u547d\u4ee4\u5927\u5168\uff01<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMySQL\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u7db2\u7ad9\u9084\u662f\u5927\u578b\u4f01\u696d\u7cfb\u7d71\uff0cMySQL\u90fd\u80fd\u63d0\u4f9b\u9ad8\u6548\u7684\u6578\u64da\u5b58\u5132\u548c\u6aa2\u7d22\u529f\u80fd\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u7684\u57fa\u672cSQL\u547d\u4ee4\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u9019\u4e00\u5f37\u5927\u7684\u5de5\u5177\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsql%ef%bc%9f-ktYjVFVcMf\">\u4ec0\u9ebc\u662fSQL\uff1f<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u806f\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u5b83\u5141\u8a31\u7528\u6236\u57f7\u884c\u5404\u7a2e\u64cd\u4f5c\uff0c\u5982\u67e5\u8a62\u6578\u64da\u3001\u66f4\u65b0\u6578\u64da\u3001\u63d2\u5165\u65b0\u6578\u64da\u548c\u522a\u9664\u6578\u64da\u3002MySQL\u652f\u6301\u591a\u7a2eSQL\u547d\u4ee4\uff0c\u9019\u4e9b\u547d\u4ee4\u53ef\u4ee5\u5206\u70ba\u5e7e\u500b\u4e3b\u8981\u985e\u5225\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u67e5\u8a62\u8a9e\u8a00\uff08DQL\uff09<\/strong><\/li>\n<li><strong>\u6578\u64da\u64cd\u4f5c\u8a9e\u8a00\uff08DML\uff09<\/strong><\/li>\n<li><strong>\u6578\u64da\u5b9a\u7fa9\u8a9e\u8a00\uff08DDL\uff09<\/strong><\/li>\n<li><strong>\u6578\u64da\u63a7\u5236\u8a9e\u8a00\uff08DCL\uff09<\/strong><\/li>\n<\/ul>\n<h2 id=\"%e5%9f%ba%e6%9c%acsql%e5%91%bd%e4%bb%a4-ktYjVFVcMf\">\u57fa\u672cSQL\u547d\u4ee4<\/h2>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e6%9f%a5%e8%a9%a2%e8%aa%9e%e8%a8%80%ef%bc%88dql%ef%bc%89-ktYjVFVcMf\">1. \u6578\u64da\u67e5\u8a62\u8a9e\u8a00\uff08DQL\uff09<\/h3>\n<p>DQL\u4e3b\u8981\u7528\u65bc\u67e5\u8a62\u6578\u64da\uff0c\u6700\u5e38\u7528\u7684\u547d\u4ee4\u662f<strong>SELECT<\/strong>\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684SELECT\u8a9e\u53e5\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM users;  -- \u67e5\u8a62\u6240\u6709\u7528\u6236\nSELECT name, email FROM users WHERE age &gt; 18;  -- \u67e5\u8a62\u5e74\u9f61\u5927\u65bc18\u7684\u7528\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\n<\/code><\/pre>\n<h3 id=\"2-%e6%95%b8%e6%93%9a%e6%93%8d%e4%bd%9c%e8%aa%9e%e8%a8%80%ef%bc%88dml%ef%bc%89-ktYjVFVcMf\">2. \u6578\u64da\u64cd\u4f5c\u8a9e\u8a00\uff08DML\uff09<\/h3>\n<p>DML\u7528\u65bc\u5c0d\u6578\u64da\u9032\u884c\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u76f8\u95dc\u7684\u547d\u4ee4\uff1a<\/p>\n<ul>\n<li><strong>INSERT<\/strong>\uff1a\u63d2\u5165\u65b0\u6578\u64da<\/li>\n<li><strong>UPDATE<\/strong>\uff1a\u66f4\u65b0\u73fe\u6709\u6578\u64da<\/li>\n<li><strong>DELETE<\/strong>\uff1a\u522a\u9664\u6578\u64da<\/li>\n<\/ul>\n<p>\u793a\u4f8b\uff1a<\/p>\n<pre><code>INSERT INTO users (name, email, age) VALUES ('John Doe', 'john@example.com', 25);  -- \u63d2\u5165\u65b0\u7528\u6236\nUPDATE users SET email = 'john.doe@example.com' WHERE name = 'John Doe';  -- \u66f4\u65b0\u7528\u6236\u96fb\u5b50\u90f5\u4ef6\nDELETE FROM users WHERE age &lt; 18;  -- \u522a\u9664\u5e74\u9f61\u5c0f\u65bc18\u7684\u7528\u6236\n<\/code><\/pre>\n<h3 id=\"3-%e6%95%b8%e6%93%9a%e5%ae%9a%e7%be%a9%e8%aa%9e%e8%a8%80%ef%bc%88ddl%ef%bc%89-ktYjVFVcMf\">3. \u6578\u64da\u5b9a\u7fa9\u8a9e\u8a00\uff08DDL\uff09<\/h3>\n<p>DDL\u7528\u65bc\u5b9a\u7fa9\u6578\u64da\u5eab\u7d50\u69cb\uff0c\u5305\u62ec\u5275\u5efa\u3001\u4fee\u6539\u548c\u522a\u9664\u8868\u3002\u5e38\u7528\u7684DDL\u547d\u4ee4\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>CREATE<\/strong>\uff1a\u5275\u5efa\u65b0\u8868<\/li>\n<li><strong>ALTER<\/strong>\uff1a\u4fee\u6539\u73fe\u6709\u8868<\/li>\n<li><strong>DROP<\/strong>\uff1a\u522a\u9664\u8868<\/li>\n<\/ul>\n<p>\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE users (id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(100), email VARCHAR(100), age INT);  -- \u5275\u5efa\u7528\u6236\u8868\nALTER TABLE users ADD COLUMN address VARCHAR(255);  -- \u70ba\u7528\u6236\u8868\u6dfb\u52a0\u5730\u5740\u5217\nDROP TABLE users;  -- \u522a\u9664\u7528\u6236\u8868\n<\/code><\/pre>\n<h3 id=\"4-%e6%95%b8%e6%93%9a%e6%8e%a7%e5%88%b6%e8%aa%9e%e8%a8%80%ef%bc%88dcl%ef%bc%89-ktYjVFVcMf\">4. \u6578\u64da\u63a7\u5236\u8a9e\u8a00\uff08DCL\uff09<\/h3>\n<p>DCL\u7528\u65bc\u63a7\u5236\u5c0d\u6578\u64da\u7684\u8a2a\u554f\u6b0a\u9650\u3002\u4e3b\u8981\u547d\u4ee4\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>GRANT<\/strong>\uff1a\u6388\u4e88\u6b0a\u9650<\/li>\n<li><strong>REVOKE<\/strong>\uff1a\u64a4\u56de\u6b0a\u9650<\/li>\n<\/ul>\n<p>\u793a\u4f8b\uff1a<\/p>\n<pre><code>GRANT SELECT, INSERT ON users TO 'username'@'localhost';  -- \u6388\u4e88\u7528\u6236\u67e5\u8a62\u548c\u63d2\u5165\u6b0a\u9650\nREVOKE INSERT ON users FROM 'username'@'localhost';  -- \u64a4\u56de\u7528\u6236\u63d2\u5165\u6b0a\u9650\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ktYjVFVcMf\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1MySQL\u7684\u57fa\u672cSQL\u547d\u4ee4\u5c0d\u65bc\u4efb\u4f55\u5e0c\u671b\u6709\u6548\u7ba1\u7406\u6578\u64da\u7684\u958b\u767c\u8005\u4f86\u8aaa\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7121\u8ad6\u662f\u67e5\u8a62\u6578\u64da\u9084\u662f\u7ba1\u7406\u6578\u64da\u5eab\u7d50\u69cb\uff0c\u9019\u4e9b\u547d\u4ee4\u90fd\u80fd\u5e6b\u52a9\u7528\u6236\u9ad8\u6548\u5730\u5b8c\u6210\u4efb\u52d9\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u4e14\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u6258\u7ba1\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u66f4\u5feb\u7684\u6578\u64da\u8655\u7406\u901f\u5ea6\u548c\u66f4\u9ad8\u7684\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u73a9\u6293MYSQL\u6578\u64da\u5eab\u7684\u6a02\u8da3\uff0c\u638c\u63e1SQL\u547d\u4ee4\u5927\u5168\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6280\u80fd\uff0c\u8f15\u9b06\u64cd\u4f5c\u6578\u64da\u5eab\uff01<\/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-190036","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190036","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=190036"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190036\/revisions"}],"predecessor-version":[{"id":190037,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190036\/revisions\/190037"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=190036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=190036"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=190036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}