{"id":183388,"date":"2024-11-10T04:24:17","date_gmt":"2024-11-09T20:24:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/183388\/"},"modified":"2024-11-10T04:24:18","modified_gmt":"2024-11-09T20:24:18","slug":"%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e6%9f%a5%e8%a9%a2%e5%92%8c%e6%9b%b4%e6%96%b0%e5%8a%9f%e8%83%bd%e7%9a%84%e6%95%99%e7%a8%8b-%e5%ae%8c%e6%88%90%e5%b0%8d%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/183388\/","title":{"rendered":"\u5be6\u73fe\u6578\u64da\u5eab\u6578\u64da\u67e5\u8a62\u548c\u66f4\u65b0\u529f\u80fd\u7684\u6559\u7a0b (\u5b8c\u6210\u5c0d\u6578\u64da\u5eab\u6578\u64da\u7684\u67e5\u8a62\u8207\u66f4\u65b0)"},"content":{"rendered":"<h1 id=\"%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e6%9f%a5%e8%a9%a2%e5%92%8c%e6%9b%b4%e6%96%b0%e5%8a%9f%e8%83%bd%e7%9a%84%e6%95%99%e7%a8%8b-aWMOpawVan\">\u5be6\u73fe\u6578\u64da\u5eab\u6578\u64da\u67e5\u8a62\u548c\u66f4\u65b0\u529f\u80fd\u7684\u6559\u7a0b<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u67e5\u8a62\u548c\u66f4\u65b0\u529f\u80fd\u662f\u4efb\u4f55\u61c9\u7528\u7a0b\u5e8f\u7684\u6838\u5fc3\u7d44\u6210\u90e8\u5206\u3002\u7121\u8ad6\u662f\u7db2\u7ad9\u3001\u79fb\u52d5\u61c9\u7528\u9084\u662f\u4f01\u696d\u7cfb\u7d71\uff0c\u80fd\u5920\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u6578\u64da\u67e5\u8a62\u548c\u66f4\u65b0\u529f\u80fd\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98-aWMOpawVan\">\u6578\u64da\u5eab\u57fa\u790e\u77e5\u8b58<\/h2>\n<p>\u6578\u64da\u5eab\u662f\u4e00\u7a2e\u6709\u7d44\u7e54\u7684\u6578\u64da\u96c6\u5408\uff0c\u901a\u5e38\u4ee5\u8868\u683c\u7684\u5f62\u5f0f\u5b58\u5132\u3002\u6bcf\u500b\u8868\u683c\u7531\u884c\u548c\u5217\u7d44\u6210\uff0c\u884c\u4ee3\u8868\u8a18\u9304\uff0c\u5217\u4ee3\u8868\u5c6c\u6027\u3002\u5e38\u898b\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u5305\u62ec MySQL\u3001PostgreSQL \u548c SQLite \u7b49\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-aWMOpawVan\">\u67e5\u8a62\u6578\u64da<\/h2>\n<p>\u67e5\u8a62\u6578\u64da\u662f\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u4fe1\u606f\u7684\u904e\u7a0b\u3002\u6700\u5e38\u7528\u7684\u67e5\u8a62\u8a9e\u8a00\u662f SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684 SQL \u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e9%81%b8%e6%93%87%e6%89%80%e6%9c%89%e8%a8%98%e9%8c%84-aWMOpawVan\">\u9078\u64c7\u6240\u6709\u8a18\u9304<\/h3>\n<pre><code>SELECT * FROM users;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u5f9e\u540d\u70ba <code>users<\/code> \u7684\u8868\u4e2d\u9078\u64c7\u6240\u6709\u8a18\u9304\u3002<\/p>\n<h3 id=\"%e6%a0%b9%e6%93%9a%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2-aWMOpawVan\">\u6839\u64da\u689d\u4ef6\u67e5\u8a62<\/h3>\n<pre><code>SELECT * FROM users WHERE age &gt; 18;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u9078\u64c7\u6240\u6709\u5e74\u9f61\u5927\u65bc 18 \u6b72\u7684\u7528\u6236\u3002<\/p>\n<h3 id=\"%e9%81%b8%e6%93%87%e7%89%b9%e5%ae%9a%e5%88%97-aWMOpawVan\">\u9078\u64c7\u7279\u5b9a\u5217<\/h3>\n<pre><code>SELECT username, email FROM users;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u50c5\u9078\u64c7\u7528\u6236\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u5169\u5217\u3002<\/p>\n<h2 id=\"%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-aWMOpawVan\">\u66f4\u65b0\u6578\u64da<\/h2>\n<p>\u66f4\u65b0\u6578\u64da\u662f\u4fee\u6539\u6578\u64da\u5eab\u4e2d\u73fe\u6709\u8a18\u9304\u7684\u904e\u7a0b\u3002\u4f7f\u7528 SQL \u7684 <code>UPDATE<\/code> \u8a9e\u53e5\u53ef\u4ee5\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u66f4\u65b0\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e6%9b%b4%e6%96%b0%e7%89%b9%e5%ae%9a%e8%a8%98%e9%8c%84-aWMOpawVan\">\u66f4\u65b0\u7279\u5b9a\u8a18\u9304<\/h3>\n<pre><code>UPDATE users SET email = 'newemail@example.com' WHERE username = 'john_doe';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u66f4\u65b0\u7528\u6236\u540d\u70ba <code>john_doe<\/code> \u7684\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n<h3 id=\"%e6%89%b9%e9%87%8f%e6%9b%b4%e6%96%b0-aWMOpawVan\">\u6279\u91cf\u66f4\u65b0<\/h3>\n<pre><code>UPDATE users SET status = 'active' WHERE last_login &gt; '2023-01-01';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u628a\u6240\u6709\u5728 2023 \u5e74 1 \u6708 1 \u65e5\u4e4b\u5f8c\u767b\u9304\u7684\u7528\u6236\u7684\u72c0\u614b\u66f4\u65b0\u70ba <code>active<\/code>\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e5%92%8c%e6%9b%b4%e6%96%b0%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-aWMOpawVan\">\u67e5\u8a62\u548c\u66f4\u65b0\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15\uff1a<\/strong>\u70ba\u7d93\u5e38\u67e5\u8a62\u7684\u5217\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li><strong>\u907f\u514d SELECT *\uff1a<\/strong>\u5728\u67e5\u8a62\u6642\u6307\u5b9a\u6240\u9700\u7684\u5217\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e8b\u52d9\uff1a<\/strong>\u5728\u9032\u884c\u591a\u500b\u66f4\u65b0\u64cd\u4f5c\u6642\uff0c\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<li><strong>\u5b9a\u671f\u5099\u4efd\uff1a<\/strong>\u5728\u9032\u884c\u5927\u898f\u6a21\u66f4\u65b0\u4e4b\u524d\uff0c\u52d9\u5fc5\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u640d\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-aWMOpawVan\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u7684\u67e5\u8a62\u548c\u66f4\u65b0\u529f\u80fd\u662f\u61c9\u7528\u7a0b\u5e8f\u958b\u767c\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u901a\u904e\u638c\u63e1 SQL \u8a9e\u8a00\u7684\u57fa\u672c\u7528\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u7121\u8ad6\u662f\u7c21\u55ae\u7684\u67e5\u8a62\u9084\u662f\u8907\u96dc\u7684\u66f4\u65b0\uff0c\u7406\u89e3\u9019\u4e9b\u57fa\u672c\u6982\u5ff5\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u958b\u767c\u6548\u7387\u548c\u6578\u64da\u7ba1\u7406\u80fd\u529b\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u9805\u76ee\u9084\u662f\u5927\u578b\u4f01\u696d\u61c9\u7528\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5be6\u73fe\u6578\u64da\u5eab\u6578\u64da\u67e5\u8a62\u548c\u66f4\u65b0\u529f\u80fd\uff0c\u638c\u63e1\u57fa\u672c\u64cd\u4f5c\u548c\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\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-183388","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183388","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=183388"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183388\/revisions"}],"predecessor-version":[{"id":183389,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/183388\/revisions\/183389"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=183388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=183388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=183388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}