{"id":185242,"date":"2024-11-10T19:55:15","date_gmt":"2024-11-10T11:55:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185242\/"},"modified":"2024-11-10T19:55:16","modified_gmt":"2024-11-10T11:55:16","slug":"%e4%bd%bf%e7%94%a8sql-server%e5%af%a6%e7%8f%be%e7%b2%be%e6%ba%96%e9%81%8b%e7%ae%97%ef%bc%88sqlserver%e9%81%8b%e7%ae%97%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185242\/","title":{"rendered":"\u4f7f\u7528SQL Server\u5be6\u73fe\u7cbe\u6e96\u904b\u7b97\uff08sqlserver\u904b\u7b97\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8sql-server%e5%af%a6%e7%8f%be%e7%b2%be%e6%ba%96%e9%81%8b%e7%ae%97%ef%bc%88sqlserver%e9%81%8b%e7%ae%97%ef%bc%89-ztZPejpLEK\">\u4f7f\u7528SQL Server\u5be6\u73fe\u7cbe\u6e96\u904b\u7b97\uff08sqlserver\u904b\u7b97\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u7cbe\u6e96\u904b\u7b97\u5c0d\u65bc\u4f01\u696d\u7684\u6c7a\u7b56\u548c\u904b\u71df\u81f3\u95dc\u91cd\u8981\u3002SQL Server\u4f5c\u70ba\u4e00\u6b3e\u5f37\u5927\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u652f\u6301\u7cbe\u6e96\u904b\u7b97\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5229\u7528SQL Server\u5be6\u73fe\u7cbe\u6e96\u904b\u7b97\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"sql-server%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-ztZPejpLEK\">SQL Server\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5728\u9032\u884c\u7cbe\u6e96\u904b\u7b97\u6642\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u5305\u62ec\u6574\u6578\u3001\u6d6e\u9ede\u6578\u548c\u5341\u9032\u5236\u6578\u7b49\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u8a08\u7b97\uff0c\u5efa\u8b70\u4f7f\u7528<strong>DECIMAL<\/strong>\u6216<strong>NUMERIC<\/strong>\u6578\u64da\u985e\u578b\uff0c\u56e0\u70ba\u5b83\u5011\u53ef\u4ee5\u6307\u5b9a\u7cbe\u5ea6\u548c\u5c0f\u6578\u4f4d\u6578\u3002<\/p>\n<pre><code>-- \u5b9a\u7fa9\u4e00\u500b\u9ad8\u7cbe\u5ea6\u7684\u6578\u64da\u985e\u578b\nCREATE TABLE Sales (\n    SaleID INT PRIMARY KEY,\n    Amount DECIMAL(10, 2) -- 10\u4f4d\u6578\u5b57\uff0c\u5176\u4e2d2\u4f4d\u70ba\u5c0f\u6578\n);\n<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8%e9%80%b2%e8%a1%8c%e8%a8%88%e7%ae%97-ztZPejpLEK\">\u4f7f\u7528\u805a\u5408\u51fd\u6578\u9032\u884c\u8a08\u7b97<\/h2>\n<p>SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u805a\u5408\u51fd\u6578\uff0c\u5982<strong>SUM<\/strong>\u3001<strong>AVG<\/strong>\u3001<strong>COUNT<\/strong>\u7b49\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u8a08\u7b97\u6578\u64da\u96c6\u7684\u7d71\u8a08\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528<strong>SUM<\/strong>\u51fd\u6578\u8a08\u7b97\u92b7\u552e\u7e3d\u984d\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>-- \u8a08\u7b97\u92b7\u552e\u7e3d\u984d\nSELECT SUM(Amount) AS TotalSales\nFROM Sales;\n<\/code><\/pre>\n<h2 id=\"%e7%b2%be%e7%a2%ba%e8%a8%88%e7%ae%97%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ztZPejpLEK\">\u7cbe\u78ba\u8a08\u7b97\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u9032\u884c\u7cbe\u78ba\u8a08\u7b97\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u907f\u514d\u6d6e\u9ede\u6578\u904b\u7b97\uff1a<\/strong>\u6d6e\u9ede\u6578\u5728\u8a08\u7b97\u6642\u53ef\u80fd\u6703\u51fa\u73fe\u7cbe\u5ea6\u640d\u5931\uff0c\u56e0\u6b64\u5728\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u60c5\u6cc1\u4e0b\uff0c\u61c9\u4f7f\u7528DECIMAL\u6216NUMERIC\u985e\u578b\u3002<\/li>\n<li><strong>\u8003\u616e\u56db\u6368\u4e94\u5165\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u8a08\u7b97\u7d50\u679c\u53ef\u80fd\u9700\u8981\u9032\u884c\u56db\u6368\u4e94\u5165\uff0c\u4ee5\u7b26\u5408\u696d\u52d9\u9700\u6c42\u3002\u53ef\u4ee5\u4f7f\u7528<strong>ROUND<\/strong>\u51fd\u6578\u4f86\u5be6\u73fe\u3002<\/li>\n<li><strong>\u4f7f\u7528\u4e8b\u52d9\u4fdd\u8b49\u6578\u64da\u4e00\u81f4\u6027\uff1a<\/strong>\u5728\u9032\u884c\u591a\u6b65\u8a08\u7b97\u6642\uff0c\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e8%a8%88%e7%ae%97%e5%b9%b3%e5%9d%87%e9%8a%b7%e5%94%ae%e9%a1%8d-ztZPejpLEK\">\u793a\u4f8b\uff1a\u8a08\u7b97\u5e73\u5747\u92b7\u552e\u984d<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u8a08\u7b97\u5e73\u5747\u92b7\u552e\u984d\u7684\u793a\u4f8b\uff0c\u4f7f\u7528<strong>AVG<\/strong>\u51fd\u6578\u4f86\u7372\u53d6\u7d50\u679c\uff1a<\/p>\n<pre><code>-- \u8a08\u7b97\u5e73\u5747\u92b7\u552e\u984d\nSELECT AVG(Amount) AS AverageSales\nFROM Sales;\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-ztZPejpLEK\">\u7d50\u8ad6<\/h2>\n<p>SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u548c\u529f\u80fd\u4f86\u652f\u6301\u7cbe\u6e96\u904b\u7b97\uff0c\u5f9e\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u5230\u4f7f\u7528\u805a\u5408\u51fd\u6578\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u9748\u6d3b\u904b\u7528\u9019\u4e9b\u529f\u80fd\u4f86\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002\u901a\u904e\u6b63\u78ba\u7684\u6578\u64da\u8655\u7406\u548c\u8a08\u7b97\u65b9\u6cd5\uff0c\u4f01\u696d\u80fd\u5920\u7372\u5f97\u66f4\u6e96\u78ba\u7684\u6578\u64da\u5206\u6790\u7d50\u679c\uff0c\u5f9e\u800c\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u904b\u884c\u60a8\u7684SQL Server\u5be6\u4f8b\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u548c\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u4f7f\u7528SQL Server\u9032\u884c\u7cbe\u6e96\u904b\u7b97\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u78ba\u4fdd\u8a08\u7b97\u7d50\u679c\u7684\u6e96\u78ba\u6027\u8207\u53ef\u9760\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-185242","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185242","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=185242"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185242\/revisions"}],"predecessor-version":[{"id":185243,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185242\/revisions\/185243"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185242"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}