{"id":180906,"date":"2024-11-09T14:10:16","date_gmt":"2024-11-09T06:10:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180906\/"},"modified":"2024-11-09T14:10:17","modified_gmt":"2024-11-09T06:10:17","slug":"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%absql%e8%aa%9e%e8%a8%80%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95-%e6%95%b8%e6%93%9a%e5%ba%absql%e7%9a%84%e5%85%b7%e9%ab%94%e4%bb%8b%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180906\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3\u6578\u64da\u5eabSQL\u8a9e\u8a00\u4f7f\u7528\u65b9\u6cd5 (\u6578\u64da\u5eabsql\u7684\u5177\u9ad4\u4ecb\u7d39)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%absql%e8%aa%9e%e8%a8%80%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95-%e6%95%b8%e6%93%9a%e5%ba%absql%e7%9a%84%e5%85%b7%e9%ab%94%e4%bb%8b%e7%b4%b9-wJqmBDgqGW\">\u6df1\u5165\u4e86\u89e3\u6578\u64da\u5eabSQL\u8a9e\u8a00\u4f7f\u7528\u65b9\u6cd5 (\u6578\u64da\u5eabSQL\u7684\u5177\u9ad4\u4ecb\u7d39)<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u800cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u5247\u662f\u8207\u9019\u4e9b\u7cfb\u7d71\u9032\u884c\u4ea4\u4e92\u7684\u4e3b\u8981\u5de5\u5177\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSQL\u7684\u57fa\u672c\u6982\u5ff5\u3001\u5e38\u7528\u8a9e\u6cd5\u53ca\u5176\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 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id=\"sql%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%84%e6%88%90%e9%83%a8%e5%88%86-wJqmBDgqGW\">SQL\u7684\u57fa\u672c\u7d44\u6210\u90e8\u5206<\/h2>\n<p>SQL\u8a9e\u8a00\u4e3b\u8981\u7531\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\u7d44\u6210\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u5b9a\u7fa9\u8a9e\u8a00\uff08DDL\uff09<\/strong>\uff1a\u7528\u65bc\u5b9a\u7fa9\u6578\u64da\u5eab\u7d50\u69cb\u7684\u8a9e\u53e5\uff0c\u5982\u5275\u5efa\u3001\u4fee\u6539\u548c\u522a\u9664\u8868\u683c\u3002<\/li>\n<li><strong>\u6578\u64da\u64cd\u4f5c\u8a9e\u8a00\uff08DML\uff09<\/strong>\uff1a\u7528\u65bc\u64cd\u4f5c\u6578\u64da\u7684\u8a9e\u53e5\uff0c\u5982\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002<\/li>\n<li><strong>\u6578\u64da\u67e5\u8a62\u8a9e\u8a00\uff08DQL\uff09<\/strong>\uff1a\u7528\u65bc\u67e5\u8a62\u6578\u64da\u7684\u8a9e\u53e5\uff0c\u4e3b\u8981\u662fSELECT\u8a9e\u53e5\u3002<\/li>\n<li><strong>\u6578\u64da\u63a7\u5236\u8a9e\u8a00\uff08DCL\uff09<\/strong>\uff1a\u7528\u65bc\u63a7\u5236\u5c0d\u6578\u64da\u7684\u8a2a\u554f\u6b0a\u9650\u7684\u8a9e\u53e5\uff0c\u5982GRANT\u548cREVOKE\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%b8%b8%e7%94%a8%e7%9a%84sql%e8%aa%9e%e6%b3%95-wJqmBDgqGW\">\u5e38\u7528\u7684SQL\u8a9e\u6cd5<\/h2>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e5%92%8c%e8%a1%a8%e6%a0%bc-wJqmBDgqGW\">1. \u5275\u5efa\u6578\u64da\u5eab\u548c\u8868\u683c<\/h3>\n<pre><code>CREATE DATABASE my_database;\n\nCREATE TABLE users (\n    id INT PRIMARY KEY AUTO_INCREMENT,\n    username VARCHAR(50) NOT NULL,\n    password VARCHAR(50) NOT NULL,\n    email VARCHAR(100) NOT NULL\n);<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u78bc\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70bamy_database\u7684\u6578\u64da\u5eab\uff0c\u4e26\u5728\u5176\u4e2d\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70bausers\u7684\u8868\u683c\uff0c\u8a72\u8868\u683c\u5305\u542b\u7528\u6236\u7684ID\u3001\u7528\u6236\u540d\u3001\u5bc6\u78bc\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n<h3 id=\"2-%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-wJqmBDgqGW\">2. \u63d2\u5165\u6578\u64da<\/h3>\n<pre><code>INSERT INTO users (username, password, email) \nVALUES ('john_doe', 'securepassword', 'john@example.com');<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u4e00\u500b\u65b0\u7528\u6236\u7684\u6578\u64da\u63d2\u5165\u5230users\u8868\u4e2d\u3002<\/p>\n<h3 id=\"3-%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-wJqmBDgqGW\">3. \u67e5\u8a62\u6578\u64da<\/h3>\n<pre><code>SELECT * FROM users WHERE username = 'john_doe';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u8a9e\u53e5\u5c07\u8fd4\u56de\u7528\u6236\u540d\u70bajohn_doe\u7684\u6240\u6709\u4fe1\u606f\u3002<\/p>\n<h3 id=\"4-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-wJqmBDgqGW\">4. \u66f4\u65b0\u6578\u64da<\/h3>\n<pre><code>UPDATE users \nSET email = 'john.doe@example.com' \nWHERE username = 'john_doe';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u66f4\u65b0\u7528\u6236john_doe\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n<h3 id=\"5-%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-wJqmBDgqGW\">5. \u522a\u9664\u6578\u64da<\/h3>\n<pre><code>DELETE FROM users WHERE username = 'john_doe';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u522a\u9664\u7528\u6236\u540d\u70bajohn_doe\u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"sql%e7%9a%84%e5%84%aa%e5%8b%a2-wJqmBDgqGW\">SQL\u7684\u512a\u52e2<\/h2>\n<p>SQL\u8a9e\u8a00\u7684\u512a\u52e2\u5728\u65bc\u5176\u7c21\u6f54\u6027\u548c\u5f37\u5927\u529f\u80fd\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u61c9\u7528\u9084\u662f\u5927\u578b\u4f01\u696d\u7cfb\u7d71\uff0cSQL\u90fd\u80fd\u5920\u9ad8\u6548\u5730\u8655\u7406\u6578\u64da\u3002\u5176\u6a19\u6e96\u5316\u7684\u8a9e\u6cd5\u4f7f\u5f97\u958b\u767c\u8005\u80fd\u5920\u5feb\u901f\u4e0a\u624b\uff0c\u4e26\u4e14\u80fd\u5920\u5728\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e4b\u9593\u8f15\u9b06\u8f49\u63db\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-wJqmBDgqGW\">\u7d50\u8ad6<\/h2>\n<p>SQL\u4f5c\u70ba\u6578\u64da\u5eab\u7ba1\u7406\u7684\u6838\u5fc3\u8a9e\u8a00\uff0c\u7121\u8ad6\u662f\u5728\u6578\u64da\u5206\u6790\u3001\u61c9\u7528\u958b\u767c\u9084\u662f\u7cfb\u7d71\u7ba1\u7406\u4e2d\uff0c\u90fd\u626e\u6f14\u8457\u4e0d\u53ef\u6216\u7f3a\u7684\u89d2\u8272\u3002\u638c\u63e1SQL\u4e0d\u50c5\u80fd\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7684\u7d50\u69cb\u548c\u95dc\u4fc2\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u9ad8\u6548\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u4e86\u89e3\u6578\u64da\u5eabSQL\u8a9e\u8a00\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u638c\u63e1\u67e5\u8a62\u3001\u66f4\u65b0\u548c\u7ba1\u7406\u6578\u64da\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u80fd\u529b\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-180906","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180906","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=180906"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180906\/revisions"}],"predecessor-version":[{"id":180907,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180906\/revisions\/180907"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180906"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180906"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180906"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}