{"id":79848,"date":"2024-10-16T13:38:16","date_gmt":"2024-10-16T05:38:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79848\/"},"modified":"2024-10-16T13:38:16","modified_gmt":"2024-10-16T05:38:16","slug":"mysql%e6%8c%87%e4%bb%a4-sql-data-access%ef%bc%88sql%e6%95%b8%e6%93%9a%e8%a8%aa%e5%95%8f%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79848\/","title":{"rendered":"MySQL\u6307\u4ee4: SQL DATA ACCESS\uff08SQL\u6578\u64da\u8a2a\u554f\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-sql-data-access%ef%bc%88sql%e6%95%b8%e6%93%9a%e8%a8%aa%e5%95%8f%ef%bc%89-mSWQXNbLKh\">MySQL\u6307\u4ee4: SQL DATA ACCESS\uff08SQL\u6578\u64da\u8a2a\u554f\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\u3002MySQL\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u958b\u6e90\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u4e2d\u7684SQL\u6578\u64da\u8a2a\u554f\u6307\u4ee4\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u6709\u6548\u5730\u64cd\u4f5c\u548c\u7ba1\u7406\u6578\u64da\u3002<\/p>\n<h2 id=\"sql%e6%95%b8%e6%93%9a%e8%a8%aa%e5%95%8f%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-mSWQXNbLKh\">SQL\u6578\u64da\u8a2a\u554f\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002SQL\u6578\u64da\u8a2a\u554f\u6307\u4ee4\u4e3b\u8981\u5305\u62ec\u6578\u64da\u7684\u67e5\u8a62\u3001\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u7b49\u64cd\u4f5c\u3002\u9019\u4e9b\u64cd\u4f5c\u901a\u5e38\u88ab\u7a31\u70baCRUD\uff08Create, Read, Update, Delete\uff09\u3002<\/p>\n<h3 id=\"1-%e6%9f%a5%e8%a9%a2%e6%95%b8%e6%93%9a%ef%bc%88select%ef%bc%89-mSWQXNbLKh\">1. \u67e5\u8a62\u6578\u64da\uff08SELECT\uff09<\/h3>\n<p>\u67e5\u8a62\u6578\u64da\u662fSQL\u4e2d\u6700\u5e38\u7528\u7684\u64cd\u4f5c\u4e4b\u4e00\u3002\u4f7f\u7528SELECT\u6307\u4ee4\u53ef\u4ee5\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6240\u9700\u7684\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 18;<\/code><\/pre>\n<p>\u9019\u689d\u6307\u4ee4\u5c07\u5f9e\u540d\u70ba\u201cusers\u201d\u7684\u8868\u4e2d\u9078\u64c7\u6240\u6709\u5e74\u9f61\u5927\u65bc18\u7684\u7528\u6236\u3002\u53ef\u4ee5\u4f7f\u7528\u4e0d\u540c\u7684\u689d\u4ef6\u4f86\u904e\u6ffe\u6578\u64da\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT name, email FROM users WHERE country = 'Hong Kong';<\/code><\/pre>\n<h3 id=\"2-%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a%ef%bc%88insert%ef%bc%89-mSWQXNbLKh\">2. \u63d2\u5165\u6578\u64da\uff08INSERT\uff09<\/h3>\n<p>\u63d2\u5165\u6578\u64da\u6307\u4ee4\u7528\u65bc\u5c07\u65b0\u8a18\u9304\u6dfb\u52a0\u5230\u6578\u64da\u5eab\u4e2d\u3002\u4ee5\u4e0b\u662f\u63d2\u5165\u6578\u64da\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>INSERT INTO users (name, email, age) VALUES ('John Doe', 'john@example.com', 30);<\/code><\/pre>\n<p>\u9019\u689d\u6307\u4ee4\u5c07\u4e00\u500b\u65b0\u7528\u6236\u7684\u59d3\u540d\u3001\u96fb\u5b50\u90f5\u4ef6\u548c\u5e74\u9f61\u63d2\u5165\u5230\u201cusers\u201d\u8868\u4e2d\u3002<\/p>\n<h3 id=\"3-%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a%ef%bc%88update%ef%bc%89-mSWQXNbLKh\">3. \u66f4\u65b0\u6578\u64da\uff08UPDATE\uff09<\/h3>\n<p>\u66f4\u65b0\u6578\u64da\u6307\u4ee4\u7528\u65bc\u4fee\u6539\u5df2\u5b58\u5728\u7684\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u66f4\u65b0\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>UPDATE users SET email = 'john.doe@example.com' WHERE name = 'John Doe';<\/code><\/pre>\n<p>\u9019\u689d\u6307\u4ee4\u5c07\u540d\u70ba\u201cJohn Doe\u201d\u7684\u7528\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u66f4\u65b0\u70ba\u201cjohn.doe@example.com\u201d\u3002<\/p>\n<h3 id=\"4-%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a%ef%bc%88delete%ef%bc%89-mSWQXNbLKh\">4. \u522a\u9664\u6578\u64da\uff08DELETE\uff09<\/h3>\n<p>\u522a\u9664\u6578\u64da\u6307\u4ee4\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u79fb\u9664\u4e0d\u518d\u9700\u8981\u7684\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u522a\u9664\u6578\u64da\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>DELETE FROM users WHERE age &lt; 18;<\/code><\/pre>\n<p>\u9019\u689d\u6307\u4ee4\u5c07\u522a\u9664\u6240\u6709\u5e74\u9f61\u5c0f\u65bc18\u7684\u7528\u6236\u8a18\u9304\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e8%a8%aa%e5%95%8f%e7%9a%84%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-mSWQXNbLKh\">\u6578\u64da\u8a2a\u554f\u7684\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u9032\u884cSQL\u6578\u64da\u8a2a\u554f\u6642\uff0c\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u64cd\u4f5c\u7684\u6548\u7387\u548c\u5b89\u5168\u6027\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u53c3\u6578\u5316\u67e5\u8a62\uff1a<\/strong>\u9019\u53ef\u4ee5\u9632\u6b62SQL\u6ce8\u5165\u653b\u64ca\uff0c\u589e\u5f37\u6578\u64da\u5b89\u5168\u6027\u3002<\/li>\n<li><strong>\u5b9a\u671f\u5099\u4efd\u6578\u64da\uff1a<\/strong>\u78ba\u4fdd\u6578\u64da\u4e0d\u6703\u56e0\u610f\u5916\u60c5\u6cc1\u800c\u4e1f\u5931\u3002<\/li>\n<li><strong>\u512a\u5316\u67e5\u8a62\uff1a<\/strong>\u4f7f\u7528\u7d22\u5f15\u548c\u9069\u7576\u7684\u67e5\u8a62\u7d50\u69cb\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-mSWQXNbLKh\">\u7d50\u8ad6<\/h2>\n<p>MySQL\u4e2d\u7684SQL\u6578\u64da\u8a2a\u554f\u6307\u4ee4\u662f\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u57fa\u790e\uff0c\u7406\u89e3\u9019\u4e9b\u6307\u4ee4\u7684\u4f7f\u7528\u65b9\u6cd5\u5c0d\u65bc\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u6709\u6548\u5730\u4f7f\u7528\u9019\u4e9b\u6307\u4ee4\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u9999\u6e2f\u7684VPS\u74b0\u5883\u4e2d\u904b\u884cMySQL\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002\u7121\u8ad6\u662f\u9078\u64c7<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u652f\u6301\u548c\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u5be6\u73fe\u6700\u4f73\u7684\u6578\u64da\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u6307\u4ee4\u4e2d\u7684SQL\u6578\u64da\u8a2a\u554f\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\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-79848","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79848","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=79848"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79848\/revisions"}],"predecessor-version":[{"id":79849,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79848\/revisions\/79849"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79848"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79848"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}