{"id":180022,"date":"2024-11-09T06:45:19","date_gmt":"2024-11-08T22:45:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180022\/"},"modified":"2024-11-09T06:45:20","modified_gmt":"2024-11-08T22:45:20","slug":"%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a2%ba%e8%bc%b8%e5%85%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e8%aa%9e%e5%8f%a5%ef%bc%9ftype-in%e6%8a%80%e5%b7%a7%e5%88%86%e4%ba%ab-%e6%95%b8%e6%93%9a%e5%ba%ab%e8%aa%9e%e5%8f%a5ty","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180022\/","title":{"rendered":"\u5982\u4f55\u6b63\u78ba\u8f38\u5165\u6578\u64da\u5eab\u8a9e\u53e5\uff1ftype in\u6280\u5de7\u5206\u4eab (\u6578\u64da\u5eab\u8a9e\u53e5type in)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a2%ba%e8%bc%b8%e5%85%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e8%aa%9e%e5%8f%a5%ef%bc%9ftype-in%e6%8a%80%e5%b7%a7%e5%88%86%e4%ba%ab-%e6%95%b8%e6%93%9a%e5%ba%ab%e8%aa%9e%e5%8f%a5ty-sikfYOKlnJ\">\u5982\u4f55\u6b63\u78ba\u8f38\u5165\u6578\u64da\u5eab\u8a9e\u53e5\uff1ftype in\u6280\u5de7\u5206\u4eab (\u6578\u64da\u5eab\u8a9e\u53e5type in)<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7121\u8ad6\u662f\u958b\u767c\u61c9\u7528\u7a0b\u5e8f\u9084\u662f\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u6b63\u78ba\u5730\u8f38\u5165\u6578\u64da\u5eab\u8a9e\u53e5\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u5206\u4eab\u4e00\u4e9b\u6709\u6548\u7684\u6280\u5de7\uff0c\u5e6b\u52a9\u60a8\u6b63\u78ba\u8f38\u5165\u6578\u64da\u5eab\u8a9e\u53e5\uff0c\u5f9e\u800c\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<h2 id=\"%e4%ba%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%ab%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-sikfYOKlnJ\">\u4e86\u89e3\u6578\u64da\u5eab\u8a9e\u53e5\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>\u6578\u64da\u5eab\u8a9e\u53e5\u901a\u5e38\u7531\u95dc\u9375\u5b57\u3001\u8868\u540d\u3001\u5217\u540d\u548c\u689d\u4ef6\u7d44\u6210\u3002\u6700\u5e38\u898b\u7684\u6578\u64da\u5eab\u8a9e\u53e5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>SELECT<\/code>\uff1a\u7528\u65bc\u67e5\u8a62\u6578\u64da\u3002<\/li>\n<li><code>INSERT<\/code>\uff1a\u7528\u65bc\u63d2\u5165\u65b0\u6578\u64da\u3002<\/li>\n<li><code>UPDATE<\/code>\uff1a\u7528\u65bc\u66f4\u65b0\u73fe\u6709\u6578\u64da\u3002<\/li>\n<li><code>DELETE<\/code>\uff1a\u7528\u65bc\u522a\u9664\u6578\u64da\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 18;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u7684\u610f\u601d\u662f\u5f9e <code>users<\/code> \u8868\u4e2d\u9078\u64c7\u6240\u6709\u5e74\u9f61\u5927\u65bc18\u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%ad%a3%e7%a2%ba%e7%9a%84%e8%aa%9e%e6%b3%95-sikfYOKlnJ\">\u4f7f\u7528\u6b63\u78ba\u7684\u8a9e\u6cd5<\/h2>\n<p>\u6bcf\u7a2e\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u90fd\u6709\u5176\u7279\u5b9a\u7684\u8a9e\u6cd5\u898f\u5247\u3002\u78ba\u4fdd\u60a8\u719f\u6089\u6240\u4f7f\u7528\u7684\u6578\u64da\u5eab\u7684\u8a9e\u6cd5\u3002\u4f8b\u5982\uff0c\u5728 MySQL \u4e2d\uff0c\u5b57\u7b26\u4e32\u9700\u8981\u7528\u55ae\u5f15\u865f\u5305\u570d\uff0c\u800c\u5728 SQL Server \u4e2d\u5247\u53ef\u4ee5\u4f7f\u7528\u96d9\u5f15\u865f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u8a9e\u6cd5\u932f\u8aa4\uff1a<\/p>\n<ul>\n<li>\u5fd8\u8a18\u5728\u5b57\u7b26\u4e32\u5468\u570d\u52a0\u5f15\u865f\u3002<\/li>\n<li>\u4f7f\u7528\u932f\u8aa4\u7684\u95dc\u9375\u5b57\u6216\u62fc\u5beb\u932f\u8aa4\u3002<\/li>\n<li>\u672a\u6b63\u78ba\u4f7f\u7528\u5206\u865f\u7d50\u675f\u8a9e\u53e5\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u4ee5\u4e0b\u8a9e\u53e5\u662f\u932f\u8aa4\u7684\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE name = John;<\/code><\/pre>\n<p>\u6b63\u78ba\u7684\u5beb\u6cd5\u61c9\u8a72\u662f\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE name = 'John';<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%a8%bb%e8%a7%a3%e6%8f%90%e9%ab%98%e5%8f%af%e8%ae%80%e6%80%a7-sikfYOKlnJ\">\u4f7f\u7528\u8a3b\u89e3\u63d0\u9ad8\u53ef\u8b80\u6027<\/h2>\n<p>\u5728\u8907\u96dc\u7684\u6578\u64da\u5eab\u8a9e\u53e5\u4e2d\uff0c\u4f7f\u7528\u8a3b\u89e3\u53ef\u4ee5\u5e6b\u52a9\u60a8\u548c\u5176\u4ed6\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u4ee3\u78bc\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528 <code>--<\/code> \u4f86\u6dfb\u52a0\u55ae\u884c\u8a3b\u89e3\uff0c\u6216\u4f7f\u7528 <code>\/* ... *\/<\/code> \u4f86\u6dfb\u52a0\u591a\u884c\u8a3b\u89e3\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM users -- \u67e5\u8a62\u6240\u6709\u7528\u6236\nWHERE age &gt; 18; \/* \u5e74\u9f61\u5927\u65bc18\u7684\u7528\u6236 *\/<\/code><\/pre>\n<h2 id=\"%e6%b8%ac%e8%a9%a6%e5%92%8c%e9%a9%97%e8%ad%89%e8%aa%9e%e5%8f%a5-sikfYOKlnJ\">\u6e2c\u8a66\u548c\u9a57\u8b49\u8a9e\u53e5<\/h2>\n<p>\u5728\u5c07\u6578\u64da\u5eab\u8a9e\u53e5\u61c9\u7528\u65bc\u751f\u7522\u74b0\u5883\u4e4b\u524d\uff0c\u52d9\u5fc5\u5728\u6e2c\u8a66\u74b0\u5883\u4e2d\u9032\u884c\u6e2c\u8a66\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u8a9e\u53e5\u7684\u6b63\u78ba\u6027\uff0c\u4e26\u907f\u514d\u5c0d\u751f\u7522\u6578\u64da\u9020\u6210\u640d\u5bb3\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u9032\u884c\u6e2c\u8a66\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528 <code>EXPLAIN<\/code> \u8a9e\u53e5\u4f86\u5206\u6790\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li>\u5728\u6e2c\u8a66\u6578\u64da\u5eab\u4e2d\u57f7\u884c\u8a9e\u53e5\uff0c\u6aa2\u67e5\u7d50\u679c\u662f\u5426\u7b26\u5408\u9810\u671f\u3002<\/li>\n<li>\u4f7f\u7528\u4e8b\u52d9\u4f86\u4fdd\u8b77\u6578\u64da\uff0c\u78ba\u4fdd\u5728\u51fa\u932f\u6642\u53ef\u4ee5\u56de\u6efe\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-sikfYOKlnJ\">\u7d50\u8ad6<\/h2>\n<p>\u6b63\u78ba\u8f38\u5165\u6578\u64da\u5eab\u8a9e\u53e5\u662f\u6578\u64da\u7ba1\u7406\u4e2d\u7684\u4e00\u9805\u57fa\u672c\u6280\u80fd\u3002\u901a\u904e\u4e86\u89e3\u57fa\u672c\u7d50\u69cb\u3001\u4f7f\u7528\u6b63\u78ba\u7684\u8a9e\u6cd5\u3001\u6dfb\u52a0\u8a3b\u89e3\u4ee5\u53ca\u9032\u884c\u6e2c\u8a66\uff0c\u60a8\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6e96\u78ba\u6027\u548c\u6548\u7387\u3002\u96a8\u8457\u6280\u8853\u7684\u767c\u5c55\uff0c\u638c\u63e1\u9019\u4e9b\u6280\u5de7\u5c07\u4f7f\u60a8\u5728\u6578\u64da\u7ba1\u7406\u9818\u57df\u4e2d\u66f4\u52a0\u6e38\u5203\u6709\u9918\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u6b63\u78ba\u8f38\u5165\u6578\u64da\u5eab\u8a9e\u53e5\uff0c\u638c\u63e1\u5be6\u7528\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387\uff0c\u907f\u514d\u5e38\u898b\u932f\u8aa4\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-180022","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180022","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=180022"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180022\/revisions"}],"predecessor-version":[{"id":180023,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180022\/revisions\/180023"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180022"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180022"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180022"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}