{"id":189110,"date":"2024-11-12T04:43:17","date_gmt":"2024-11-11T20:43:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/189110\/"},"modified":"2024-11-12T04:43:19","modified_gmt":"2024-11-11T20:43:19","slug":"%e6%8f%90%e5%8d%87%e6%a5%b5%e5%a4%a7%e6%8f%90%e5%8d%87mssql%e8%87%aa%e5%ae%9a%e7%be%a9%e5%87%bd%e6%95%b8%e6%95%88%e7%8e%87%ef%bc%88mssql%e8%87%aa%e5%ae%9a%e7%be%a9%e5%87%bd%e6%95%b8%e6%95%88%e7%8e%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/189110\/","title":{"rendered":"\u63d0\u5347\u6975\u5927\u63d0\u5347mssql\u81ea\u5b9a\u7fa9\u51fd\u6578\u6548\u7387\uff08mssql\u81ea\u5b9a\u7fa9\u51fd\u6578\u6548\u7387\uff09"},"content":{"rendered":"<h1 id=\"%e6%8f%90%e5%8d%87%e6%a5%b5%e5%a4%a7%e6%8f%90%e5%8d%87mssql%e8%87%aa%e5%ae%9a%e7%be%a9%e5%87%bd%e6%95%b8%e6%95%88%e7%8e%87-xRygRRaLZf\">\u63d0\u5347\u6975\u5927\u63d0\u5347MSSQL\u81ea\u5b9a\u7fa9\u51fd\u6578\u6548\u7387<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMicrosoft SQL 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\u907f\u514d\u5728SELECT\u8a9e\u53e5\u4e2d\u4f7f\u7528\u81ea\u5b9a\u7fa9\u51fd\u6578<\/h3>\n<p>\u5728SELECT\u8a9e\u53e5\u4e2d\u4f7f\u7528\u81ea\u5b9a\u7fa9\u51fd\u6578\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u76f8\u53cd\uff0c\u61c9\u8003\u616e\u5c07\u81ea\u5b9a\u7fa9\u51fd\u6578\u7684\u908f\u8f2f\u79fb\u81f3JOIN\u6216WHERE\u5b50\u53e5\u4e2d\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e8%a1%a8%e5%80%bc%e5%87%bd%e6%95%b8%e4%bb%a3%e6%9b%bf%e6%a8%99%e9%87%8f%e5%87%bd%e6%95%b8-xRygRRaLZf\">3. \u4f7f\u7528\u8868\u503c\u51fd\u6578\u4ee3\u66ff\u6a19\u91cf\u51fd\u6578<\/h3>\n<p>\u5982\u679c\u9700\u8981\u8fd4\u56de\u591a\u500b\u503c\uff0c\u8003\u616e\u4f7f\u7528\u8868\u503c\u51fd\u6578\u3002\u8868\u503c\u51fd\u6578\u53ef\u4ee5\u5728JOIN\u64cd\u4f5c\u4e2d\u4f7f\u7528\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6027\u80fd\u3002<\/p>\n<h3 id=\"4-%e5%84%aa%e5%8c%96%e8%87%aa%e5%ae%9a%e7%be%a9%e5%87%bd%e6%95%b8%e7%9a%84%e9%82%8f%e8%bc%af-xRygRRaLZf\">4. \u512a\u5316\u81ea\u5b9a\u7fa9\u51fd\u6578\u7684\u908f\u8f2f<\/h3>\n<p>\u5c0d\u81ea\u5b9a\u7fa9\u51fd\u6578\u7684\u908f\u8f2f\u9032\u884c\u512a\u5316\u662f\u63d0\u5347\u6027\u80fd\u7684\u95dc\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE FUNCTION dbo.CalculateDiscount(@Price DECIMAL(10,2), @DiscountRate DECIMAL(5,2))\nRETURNS DECIMAL(10,2)\nAS\nBEGIN\n    RETURN @Price * (1 - @DiscountRate)\nEND<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u51fd\u6578\u8a08\u7b97\u6298\u6263\u5f8c\u7684\u50f9\u683c\u3002\u78ba\u4fdd\u51fd\u6578\u5167\u90e8\u908f\u8f2f\u7c21\u55ae\u4e14\u9ad8\u6548\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8a08\u7b97\u3002<\/p>\n<h3 id=\"5-%e6%b8%9b%e5%b0%91%e5%87%bd%e6%95%b8%e7%9a%84%e8%aa%bf%e7%94%a8%e6%ac%a1%e6%95%b8-xRygRRaLZf\">5. 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