{"id":138429,"date":"2024-10-31T14:24:23","date_gmt":"2024-10-31T06:24:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138429\/"},"modified":"2024-10-31T14:24:25","modified_gmt":"2024-10-31T06:24:25","slug":"sql-server%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c%e9%9a%a8%e6%a9%9f%e6%8e%92%e5%ba%8f%e8%88%87%e5%b8%b8%e7%94%a8%e5%87%bd%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138429\/","title":{"rendered":"SQL Server\u67e5\u8a62\u7d50\u679c\u96a8\u6a5f\u6392\u5e8f\u8207\u5e38\u7528\u51fd\u6578"},"content":{"rendered":"<h1 id=\"sql-server%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c%e9%9a%a8%e6%a9%9f%e6%8e%92%e5%ba%8f%e8%88%87%e5%b8%b8%e7%94%a8%e5%87%bd%e6%95%b8-wZMtHeUDph\">SQL Server\u67e5\u8a62\u7d50\u679c\u96a8\u6a5f\u6392\u5e8f\u8207\u5e38\u7528\u51fd\u6578<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL Server\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u7576\u6211\u5011\u9700\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u6642\uff0c\u67e5\u8a62\u7d50\u679c\u7684\u6392\u5e8f\u65b9\u5f0f\u5f80\u5f80\u6703\u5f71\u97ff\u6578\u64da\u7684\u5448\u73fe\u548c\u5206\u6790\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728SQL Server\u4e2d\u5be6\u73fe\u67e5\u8a62\u7d50\u679c\u7684\u96a8\u6a5f\u6392\u5e8f\uff0c\u4ee5\u53ca\u4e00\u4e9b\u5e38\u7528\u7684\u51fd\u6578\u3002<\/p>\n<h2 id=\"%e9%9a%a8%e6%a9%9f%e6%8e%92%e5%ba%8f%e7%9a%84%e9%9c%80%e6%b1%82-wZMtHeUDph\">\u96a8\u6a5f\u6392\u5e8f\u7684\u9700\u6c42<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u5e0c\u671b\u4ee5\u96a8\u6a5f\u7684\u65b9\u5f0f\u986f\u793a\u67e5\u8a62\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u5728\u96fb\u5b50\u5546\u52d9\u7db2\u7ad9\u4e2d\uff0c\u96a8\u6a5f\u986f\u793a\u7522\u54c1\u53ef\u4ee5\u5438\u5f15\u9867\u5ba2\u7684\u6ce8\u610f\u529b\uff0c\u589e\u52a0\u8cfc\u8cb7\u7684\u53ef\u80fd\u6027\u3002\u96a8\u6a5f\u6392\u5e8f\u9084\u53ef\u4ee5\u7528\u65bc\u6e2c\u8a66\u548c\u6578\u64da\u5206\u6790\uff0c\u5e6b\u52a9\u6211\u5011\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7684\u5206\u4f48\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8newid%e5%87%bd%e6%95%b8%e9%80%b2%e8%a1%8c%e9%9a%a8%e6%a9%9f%e6%8e%92%e5%ba%8f-wZMtHeUDph\">\u4f7f\u7528NEWID()\u51fd\u6578\u9032\u884c\u96a8\u6a5f\u6392\u5e8f<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u96a8\u6a5f\u6392\u5e8f\u65b9\u6cd5\u662f\u4f7f\u7528<code>NEWID()<\/code>\u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u6703\u751f\u6210\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u7b26\uff0c\u6bcf\u6b21\u8abf\u7528\u6642\u90fd\u6703\u8fd4\u56de\u4e0d\u540c\u7684\u503c\u3002\u901a\u904e\u5c07<code>NEWID()<\/code>\u7528\u65bc<code>ORDER BY<\/code>\u5b50\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u5be6\u73fe\u96a8\u6a5f\u6392\u5e8f\u3002<\/p>\n<pre><code>SELECT * FROM Products\nORDER BY NEWID();\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8a62\u5c07\u5f9e<code>Products<\/code>\u8868\u4e2d\u96a8\u6a5f\u9078\u64c7\u6240\u6709\u7522\u54c1\uff0c\u4e26\u4ee5\u96a8\u6a5f\u9806\u5e8f\u8fd4\u56de\u7d50\u679c\u3002\u9019\u7a2e\u65b9\u6cd5\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u56e0\u70ba\u6bcf\u4e00\u884c\u90fd\u9700\u8981\u751f\u6210\u4e00\u500b\u65b0\u7684\u552f\u4e00\u6a19\u8b58\u7b26\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8tablesample%e9%80%b2%e8%a1%8c%e9%9a%a8%e6%a9%9f%e6%8a%bd%e6%a8%a3-wZMtHeUDph\">\u4f7f\u7528TABLESAMPLE\u9032\u884c\u96a8\u6a5f\u62bd\u6a23<\/h2>\n<p>\u9664\u4e86\u4f7f\u7528<code>NEWID()<\/code>\u9032\u884c\u96a8\u6a5f\u6392\u5e8f\u5916\uff0cSQL Server\u9084\u63d0\u4f9b\u4e86<code>TABLESAMPLE<\/code>\u8a9e\u53e5\uff0c\u9019\u662f\u4e00\u7a2e\u66f4\u9ad8\u6548\u7684\u96a8\u6a5f\u62bd\u6a23\u65b9\u6cd5\u3002<code>TABLESAMPLE<\/code>\u5141\u8a31\u6211\u5011\u5f9e\u8868\u4e2d\u96a8\u6a5f\u9078\u64c7\u4e00\u5b9a\u6bd4\u4f8b\u7684\u884c\uff0c\u800c\u4e0d\u662f\u5c0d\u6574\u500b\u8868\u9032\u884c\u6392\u5e8f\u3002<\/p>\n<pre><code>SELECT * FROM Products\nTABLESAMPLE (10 PERCENT);\n<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u5f9e<code>Products<\/code>\u8868\u4e2d\u96a8\u6a5f\u9078\u64c710%\u7684\u884c\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<code>TABLESAMPLE<\/code>\u4e0d\u4fdd\u8b49\u8fd4\u56de\u7684\u884c\u6578\u91cf\uff0c\u56e0\u70ba\u5b83\u662f\u57fa\u65bc\u9801\u9762\u7684\u96a8\u6a5f\u62bd\u6a23\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e7%94%a8%e7%9a%84sql%e5%87%bd%e6%95%b8-wZMtHeUDph\">\u5e38\u7528\u7684SQL\u51fd\u6578<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u9664\u4e86\u96a8\u6a5f\u6392\u5e8f\u7684\u529f\u80fd\u5916\uff0c\u9084\u6709\u8a31\u591a\u5176\u4ed6\u5e38\u7528\u7684\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u8655\u7406\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684SQL\u51fd\u6578\uff1a<\/p>\n<ul>\n<li><strong>COUNT()<\/strong>\uff1a\u8a08\u7b97\u884c\u6578\u3002<\/li>\n<li><strong>SUM()<\/strong>\uff1a\u8a08\u7b97\u6578\u503c\u5217\u7684\u7e3d\u548c\u3002<\/li>\n<li><strong>AVG()<\/strong>\uff1a\u8a08\u7b97\u6578\u503c\u5217\u7684\u5e73\u5747\u503c\u3002<\/li>\n<li><strong>MIN()<\/strong>\uff1a\u8fd4\u56de\u5217\u4e2d\u7684\u6700\u5c0f\u503c\u3002<\/li>\n<li><strong>MAX()<\/strong>\uff1a\u8fd4\u56de\u5217\u4e2d\u7684\u6700\u5927\u503c\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u8207<code>GROUP BY<\/code>\u5b50\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u4fbf\u5c0d\u6578\u64da\u9032\u884c\u5206\u7d44\u548c\u805a\u5408\u5206\u6790\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-wZMtHeUDph\">\u7d50\u8ad6<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u96a8\u6a5f\u6392\u5e8f\u67e5\u8a62\u7d50\u679c\u53ef\u4ee5\u901a\u904e<code>NEWID()<\/code>\u548c<code>TABLESAMPLE<\/code>\u7b49\u65b9\u6cd5\u5be6\u73fe\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u80fd\u5920\u63d0\u9ad8\u6578\u64da\u7684\u53ef\u7528\u6027\uff0c\u9084\u80fd\u5e6b\u52a9\u6211\u5011\u5728\u5206\u6790\u548c\u5c55\u793a\u6578\u64da\u6642\u63d0\u4f9b\u66f4\u591a\u7684\u9748\u6d3b\u6027\u3002\u6b64\u5916\uff0c\u719f\u6089\u5e38\u7528\u7684SQL\u51fd\u6578\u5c07\u6709\u52a9\u65bc\u6211\u5011\u66f4\u6709\u6548\u5730\u8655\u7406\u548c\u5206\u6790\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u6216\u5176\u4ed6\u76f8\u95dc\u7684<code>\u670d\u52a1\u5668<\/code>\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a> \u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server\u4e2d\u67e5\u8a62\u7d50\u679c\u7684\u96a8\u6a5f\u6392\u5e8f\u65b9\u6cd5\u53ca\u5e38\u7528\u51fd\u6578\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u8207\u9748\u6d3b\u6027\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-138429","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138429","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=138429"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138429\/revisions"}],"predecessor-version":[{"id":138430,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138429\/revisions\/138430"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}