{"id":180908,"date":"2024-11-09T14:11:29","date_gmt":"2024-11-09T06:11:29","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180908\/"},"modified":"2024-11-09T14:11:30","modified_gmt":"2024-11-09T06:11:30","slug":"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e5%ba%8f%e5%88%97%e7%b5%90%e6%a7%8b-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e5%ba%8f%e5%88%97%e7%b5%90%e6%a7%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180908\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3\u6578\u64da\u5eab\u67e5\u8a62\u5e8f\u5217\u7d50\u69cb (\u6578\u64da\u5eab\u67e5\u8a62\u5e8f\u5217\u7d50\u69cb)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e5%ba%8f%e5%88%97%e7%b5%90%e6%a7%8b-HAgfxToKdP\">\u6df1\u5165\u4e86\u89e3\u6578\u64da\u5eab\u67e5\u8a62\u5e8f\u5217\u7d50\u69cb<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u67e5\u8a62\u7684\u6548\u7387\u548c\u7d50\u69cb\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u6578\u64da\u5eab\u67e5\u8a62\u5e8f\u5217\u7d50\u69cb\u662f\u6307\u5728\u57f7\u884c\u6578\u64da\u5eab\u67e5\u8a62\u6642\uff0c\u67e5\u8a62\u7684\u7d44\u7e54\u548c\u57f7\u884c\u9806\u5e8f\u3002\u7406\u89e3\u9019\u4e00\u7d50\u69cb\u4e0d\u50c5\u6709\u52a9\u65bc\u958b\u767c\u8005\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u80fd\u63d0\u9ad8\u6574\u9ad4\u7cfb\u7d71\u7684\u97ff\u61c9\u901f\u5ea6\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-HAgfxToKdP\">\u6578\u64da\u5eab\u67e5\u8a62\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u67e5\u8a62\u662f\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u7684\u8acb\u6c42\u3002\u9019\u4e9b\u67e5\u8a62\u901a\u5e38\u4f7f\u7528\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff08SQL\uff09\u4f86\u7de8\u5beb\u3002\u67e5\u8a62\u53ef\u4ee5\u662f\u7c21\u55ae\u7684\u9078\u64c7\u8a9e\u53e5\uff0c\u4e5f\u53ef\u4ee5\u662f\u8907\u96dc\u7684\u806f\u63a5\u3001\u5b50\u67e5\u8a62\u548c\u805a\u5408\u51fd\u6578\u7684\u7d44\u5408\u3002<\/p>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-HAgfxToKdP\">\u67e5\u8a62\u7684\u57fa\u672c\u7d50\u69cb<\/h3>\n<p>\u4e00\u500b\u5178\u578b\u7684SQL\u67e5\u8a62\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2\nFROM table_name\nWHERE condition\nORDER BY column1;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>SELECT<\/code>\u8a9e\u53e5\u6307\u5b9a\u4e86\u8981\u6aa2\u7d22\u7684\u5217\uff0c<code>FROM<\/code>\u8a9e\u53e5\u6307\u5b9a\u4e86\u6578\u64da\u4f86\u6e90\u8868\uff0c<code>WHERE<\/code>\u8a9e\u53e5\u7528\u65bc\u904e\u6ffe\u6578\u64da\uff0c\u800c<code>ORDER BY<\/code>\u5247\u7528\u65bc\u6392\u5e8f\u7d50\u679c\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e5%ba%8f%e5%88%97%e7%9a%84%e5%9f%b7%e8%a1%8c%e9%81%8e%e7%a8%8b-HAgfxToKdP\">\u67e5\u8a62\u5e8f\u5217\u7684\u57f7\u884c\u904e\u7a0b<\/h2>\n<p>\u6578\u64da\u5eab\u67e5\u8a62\u7684\u57f7\u884c\u904e\u7a0b\u53ef\u4ee5\u5206\u70ba\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ul>\n<li><strong>\u89e3\u6790\uff1a<\/strong>\u6578\u64da\u5eab\u7cfb\u7d71\u9996\u5148\u89e3\u6790\u67e5\u8a62\u8a9e\u53e5\uff0c\u6aa2\u67e5\u8a9e\u6cd5\u548c\u8a9e\u7fa9\u7684\u6b63\u78ba\u6027\u3002<\/li>\n<li><strong>\u512a\u5316\uff1a<\/strong>\u63a5\u4e0b\u4f86\uff0c\u6578\u64da\u5eab\u6703\u751f\u6210\u4e00\u500b\u57f7\u884c\u8a08\u5283\uff0c\u9078\u64c7\u6700\u4f73\u7684\u67e5\u8a62\u57f7\u884c\u8def\u5f91\u3002<\/li>\n<li><strong>\u57f7\u884c\uff1a<\/strong>\u6839\u64da\u751f\u6210\u7684\u57f7\u884c\u8a08\u5283\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u958b\u59cb\u57f7\u884c\u67e5\u8a62\uff0c\u6aa2\u7d22\u6240\u9700\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u8fd4\u56de\u7d50\u679c\uff1a<\/strong>\u6700\u5f8c\uff0c\u67e5\u8a62\u7d50\u679c\u6703\u8fd4\u56de\u7d66\u7528\u6236\u6216\u61c9\u7528\u7a0b\u5e8f\u3002<\/li>\n<\/ul>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96%e7%9a%84%e9%87%8d%e8%a6%81%e6%80%a7-HAgfxToKdP\">\u67e5\u8a62\u512a\u5316\u7684\u91cd\u8981\u6027<\/h3>\n<p>\u67e5\u8a62\u512a\u5316\u662f\u63d0\u9ad8\u6578\u64da\u5eab\u6027\u80fd\u7684\u95dc\u9375\u3002\u901a\u904e\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8b58\u5225\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u9032\u884c\u76f8\u61c9\u7684\u8abf\u6574\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h4 id=\"%e7%b4%a2%e5%bc%95%e7%9a%84%e4%bd%bf%e7%94%a8-HAgfxToKdP\">\u7d22\u5f15\u7684\u4f7f\u7528<\/h4>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u53ef\u4ee5\u52a0\u901f\u6578\u64da\u6aa2\u7d22\u3002\u7576\u67e5\u8a62\u4e2d\u6d89\u53ca\u5230\u7684\u5217\u6709\u7d22\u5f15\u6642\uff0c\u6578\u64da\u5eab\u53ef\u4ee5\u66f4\u5feb\u5730\u5b9a\u4f4d\u5230\u6240\u9700\u7684\u6578\u64da\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE INDEX idx_column1<br \/>\nON table_name 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