{"id":171803,"date":"2024-11-07T07:47:16","date_gmt":"2024-11-06T23:47:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/171803\/"},"modified":"2024-11-07T07:47:17","modified_gmt":"2024-11-06T23:47:17","slug":"%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%be%e9%9c%80%e6%b1%82%ef%bc%81%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8f%96%e5%87%ba5%e6%a2%9d%e6%95%b8%e6%93%9a-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8f%96%e5%87%ba5%e6%a2%9d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/171803\/","title":{"rendered":"\u8f15\u9b06\u5be6\u73fe\u9700\u6c42\uff01\u6578\u64da\u5eab\u53d6\u51fa5\u689d\u6578\u64da (\u6578\u64da\u5eab\u53d6\u51fa5\u689d\u6578\u64da)"},"content":{"rendered":"<h1 id=\"%e8%bc%95%e9%ac%86%e5%af%a6%e7%8f%be%e9%9c%80%e6%b1%82%ef%bc%81%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8f%96%e5%87%ba5%e6%a2%9d%e6%95%b8%e6%93%9a-alxxvAImkG\">\u8f15\u9b06\u5be6\u73fe\u9700\u6c42\uff01\u6578\u64da\u5eab\u53d6\u51fa5\u689d\u6578\u64da<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u64cd\u4f5c\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u7121\u8ad6\u662f\u958b\u767c\u61c9\u7528\u7a0b\u5e8f\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u6578\u64da\u90fd\u662f\u4e00\u9805\u57fa\u672c\u6280\u80fd\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u8f15\u9b06\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u53d6\u51fa5\u689d\u6578\u64da\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u904e\u7a0b\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-alxxvAImkG\">\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\u7528\u65bc\u5b58\u5132\u548c\u7ba1\u7406\u5927\u91cf\u4fe1\u606f\u3002\u5e38\u898b\u7684\u6578\u64da\u5eab\u985e\u578b\u5305\u62ec\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MySQL\u3001PostgreSQL\uff09\u548c\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff08\u5982MongoDB\uff09\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u5c08\u6ce8\u65bc\u95dc\u4fc2\u578b\u6578\u64da\u5eab\uff0c\u56e0\u70ba\u5b83\u5011\u4f7f\u7528\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff08SQL\uff09\u4f86\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8sql%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a-alxxvAImkG\">\u4f7f\u7528SQL\u67e5\u8a62\u6578\u64da<\/h2>\n<p>\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\uff0c\u6211\u5011\u901a\u5e38\u4f7f\u7528SQL\u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d65\u689d\u6578\u64da\u7684\u57fa\u672cSQL\u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM \u8868\u540d LIMIT 5;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>SELECT *<\/code>\u8868\u793a\u9078\u64c7\u6240\u6709\u5217\uff0c<code>FROM \u8868\u540d<\/code>\u6307\u5b9a\u4e86\u8981\u67e5\u8a62\u7684\u8868\uff0c<code>LIMIT 5<\/code>\u5247\u9650\u5236\u4e86\u8fd4\u56de\u7684\u7d50\u679c\u6578\u91cf\u70ba5\u689d\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%be%9e%e7%94%a8%e6%88%b6%e8%a1%a8%e4%b8%ad%e6%8f%90%e5%8f%96%e6%95%b8%e6%93%9a-alxxvAImkG\">\u793a\u4f8b\uff1a\u5f9e\u7528\u6236\u8868\u4e2d\u63d0\u53d6\u6578\u64da<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>users<\/code>\u7684\u8868\uff0c\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li><code>id<\/code> &#8211; \u7528\u6236ID<\/li>\n<li><code>name<\/code> &#8211; \u7528\u6236\u540d\u7a31<\/li>\n<li><code>email<\/code> &#8211; \u7528\u6236\u96fb\u5b50\u90f5\u4ef6<\/li>\n<li><code>created_at<\/code> &#8211; \u5275\u5efa\u6642\u9593<\/li>\n<\/ul>\n<p>\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u63d0\u53d6\u524d5\u689d\u7528\u6236\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM users LIMIT 5;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7528\u6236\u8868\u4e2d\u7684\u524d5\u689d\u8a18\u9304\uff0c\u5e6b\u52a9\u6211\u5011\u5feb\u901f\u67e5\u770b\u6578\u64da\u3002<\/p>\n<h2 id=\"%e9%80%b2%e9%9a%8e%e6%9f%a5%e8%a9%a2%ef%bc%9a%e6%a2%9d%e4%bb%b6%e9%81%8e%e6%bf%be-alxxvAImkG\">\u9032\u968e\u67e5\u8a62\uff1a\u689d\u4ef6\u904e\u6ffe<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u53ea\u60f3\u63d0\u53d6\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\u3002\u9019\u6642\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528<code>WHERE<\/code>\u5b50\u53e5\u4f86\u904e\u6ffe\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u53ea\u60f3\u63d0\u53d6\u96fb\u5b50\u90f5\u4ef6\u4ee5<code>@example.com<\/code>\u7d50\u5c3e\u7684\u7528\u6236\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE email LIKE '%@example.com' LIMIT 5;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u96fb\u5b50\u90f5\u4ef6\u4ee5<code>@example.com<\/code>\u7d50\u5c3e\u7684\u7528\u6236\uff0c\u4e26\u9650\u5236\u7d50\u679c\u70ba5\u689d\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-alxxvAImkG\">\u7e3d\u7d50<\/h2>\n<p>\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u662f\u4e00\u9805\u57fa\u672c\u800c\u91cd\u8981\u7684\u6280\u80fd\u3002\u901a\u904e\u4f7f\u7528SQL\u8a9e\u8a00\uff0c\u6211\u5011\u53ef\u4ee5\u8f15\u9b06\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u7121\u8ad6\u662f\u7c21\u55ae\u7684\u67e5\u8a62\u9084\u662f\u5e36\u6709\u689d\u4ef6\u7684\u904e\u6ffe\uff0c\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u90fd\u80fd\u5e6b\u52a9\u6211\u5011\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u5206\u6790\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\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\u7684\u6578\u64da\u5eab\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u9805\u76ee\u9084\u662f\u5927\u578b\u61c9\u7528\uff0c<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u90fd\u80fd\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u9748\u6d3b\u7684\u64f4\u5c55\u6027\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8f15\u9b06\u5be6\u73fe\u9700\u6c42\uff01\u5b78\u7fd2\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u5feb\u901f\u53d6\u51fa5\u689d\u6578\u64da\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u7c21\u5316\u5de5\u4f5c\u6d41\u7a0b\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-171803","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171803","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=171803"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171803\/revisions"}],"predecessor-version":[{"id":171804,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171803\/revisions\/171804"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=171803"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=171803"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=171803"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}