{"id":65333,"date":"2024-10-14T13:37:15","date_gmt":"2024-10-14T05:37:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/65333\/"},"modified":"2024-10-14T13:37:15","modified_gmt":"2024-10-14T05:37:15","slug":"mssql%e6%b8%9b%e6%99%82%e9%96%93%e6%b3%95%ef%bc%9a%e6%89%be%e5%9b%9e%e7%8f%8d%e8%b2%b4%e7%9a%84%e9%a1%98%e6%9c%9b%ef%bc%88mssql%e6%b8%9b%e5%8e%bb%e6%99%82%e9%96%93%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/65333\/","title":{"rendered":"MSSQL\u6e1b\u6642\u9593\u6cd5\uff1a\u627e\u56de\u73cd\u8cb4\u7684\u9858\u671b\uff08mssql\u6e1b\u53bb\u6642\u9593\uff09"},"content":{"rendered":"<h1 id=\"mssql%e6%b8%9b%e6%99%82%e9%96%93%e6%b3%95%ef%bc%9a%e6%89%be%e5%9b%9e%e7%8f%8d%e8%b2%b4%e7%9a%84%e9%a1%98%e6%9c%9b-DmPDxAVDpI\">MSSQL\u6e1b\u6642\u9593\u6cd5\uff1a\u627e\u56de\u73cd\u8cb4\u7684\u9858\u671b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6642\u9593\u7684\u8a08\u7b97\u8207\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u5c24\u5176\u662f\u5728\u4f7f\u7528 Microsoft SQL Server (MSSQL) \u6642\u3002MSSQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u8655\u7406\u6642\u9593\u6578\u64da\uff0c\u5176\u4e2d\u300c\u6e1b\u6642\u9593\u6cd5\u300d\u662f\u4e00\u500b\u5e38\u898b\u4e14\u5be6\u7528\u7684\u6280\u8853\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MSSQL \u6e1b\u6642\u9593\u6cd5\u7684\u6982\u5ff5\u3001\u61c9\u7528\u53ca\u5176\u5728\u5be6\u969b\u64cd\u4f5c\u4e2d\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-mssql-%e6%b8%9b%e6%99%82%e9%96%93%e6%b3%95%ef%bc%9f-DmPDxAVDpI\">\u4ec0\u9ebc\u662f MSSQL \u6e1b\u6642\u9593\u6cd5\uff1f<\/h2>\n<p>MSSQL \u6e1b\u6642\u9593\u6cd5\u662f\u6307\u5728 SQL \u67e5\u8a62\u4e2d\uff0c\u901a\u904e\u6e1b\u53bb\u7279\u5b9a\u7684\u6642\u9593\u9593\u9694\u4f86\u7372\u53d6\u6240\u9700\u7684\u6642\u9593\u6578\u64da\u3002\u9019\u7a2e\u65b9\u6cd5\u901a\u5e38\u7528\u65bc\u8a08\u7b97\u6642\u9593\u5dee\u3001\u904e\u53bb\u7684\u65e5\u671f\u6216\u662f\u9032\u884c\u6642\u9593\u7bc4\u570d\u7684\u67e5\u8a62\u3002\u4f7f\u7528\u9019\u7a2e\u65b9\u6cd5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u9748\u6d3b\u5730\u8655\u7406\u6642\u9593\u6578\u64da\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u67e5\u8a62\u7684\u6548\u7387\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-DmPDxAVDpI\">\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 MSSQL \u4e2d\uff0c\u6e1b\u53bb\u6642\u9593\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT DATEADD(unit, -value, date) AS NewDate\nFROM YourTable;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>unit<\/code> \u662f\u6642\u9593\u55ae\u4f4d\uff08\u5982 YEAR\u3001MONTH\u3001DAY \u7b49\uff09\uff0c<code>value<\/code> \u662f\u8981\u6e1b\u53bb\u7684\u6578\u91cf\uff0c<code>date<\/code> \u662f\u539f\u59cb\u65e5\u671f\u3002<\/p>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e7%a4%ba%e4%be%8b-DmPDxAVDpI\">\u5be6\u969b\u61c9\u7528\u793a\u4f8b<\/h2>\n<h3 id=\"1-%e8%a8%88%e7%ae%97%e9%81%8e%e5%8e%bb%e7%9a%84%e6%97%a5%e6%9c%9f-DmPDxAVDpI\">1. \u8a08\u7b97\u904e\u53bb\u7684\u65e5\u671f<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>Orders<\/code> \u7684\u8868\u683c\uff0c\u88e1\u9762\u6709\u4e00\u500b <code>OrderDate<\/code> \u6b04\u4f4d\uff0c\u6211\u5011\u60f3\u8981\u67e5\u8a62\u6240\u6709\u5728 30 \u5929\u524d\u4e0b\u7684\u8a02\u55ae\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT *\nFROM Orders\nWHERE OrderDate &lt; DATEADD(DAY, -30, GETDATE());<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u6703\u8fd4\u56de\u6240\u6709\u5728\u7576\u524d\u65e5\u671f\u4e4b\u524d 30 \u5929\u7684\u8a02\u55ae\u3002<\/p>\n<h3 id=\"2-%e8%a8%88%e7%ae%97%e6%99%82%e9%96%93%e5%b7%ae-DmPDxAVDpI\">2. \u8a08\u7b97\u6642\u9593\u5dee<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u8a08\u7b97\u67d0\u500b\u8a02\u55ae\u7684\u8655\u7406\u6642\u9593\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT OrderID, DATEDIFF(DAY, OrderDate, GETDATE()) AS DaysSinceOrder\nFROM Orders;<\/code><\/pre>\n<p>\u9019\u6bb5\u67e5\u8a62\u6703\u8fd4\u56de\u6bcf\u500b\u8a02\u55ae\u7684 ID \u53ca\u5176\u81ea\u4e0b\u55ae\u4ee5\u4f86\u7684\u5929\u6578\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-DmPDxAVDpI\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u4f7f\u7528\u6e1b\u6642\u9593\u6cd5\u6642\uff0c\u9700\u6ce8\u610f\u6642\u9593\u55ae\u4f4d\u7684\u9078\u64c7\uff0c\u78ba\u4fdd\u5176\u7b26\u5408\u696d\u52d9\u9700\u6c42\u3002<\/li>\n<li>\u5728\u9032\u884c\u65e5\u671f\u8a08\u7b97\u6642\uff0c\u8003\u616e\u5230\u6642\u5340\u7684\u5f71\u97ff\uff0c\u7279\u5225\u662f\u5728\u5168\u7403\u5316\u7684\u61c9\u7528\u4e2d\u3002<\/li>\n<li>\u5c0d\u65bc\u5927\u91cf\u6578\u64da\u7684\u67e5\u8a62\uff0c\u5efa\u8b70\u4f7f\u7528\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-DmPDxAVDpI\">\u7d50\u8ad6<\/h2>\n<p>MSSQL \u6e1b\u6642\u9593\u6cd5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u9748\u6d3b\u5730\u8655\u7406\u6642\u9593\u6578\u64da\u3002\u901a\u904e\u6b63\u78ba\u7684\u8a9e\u6cd5\u548c\u5be6\u969b\u61c9\u7528\u793a\u4f8b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u8a08\u7b97\u6642\u9593\u5dee\u3001\u67e5\u8a62\u904e\u53bb\u7684\u65e5\u671f\uff0c\u4e26\u63d0\u5347\u6578\u64da\u67e5\u8a62\u7684\u6548\u7387\u3002\u96a8\u8457\u6578\u64da\u5eab\u6280\u8853\u7684\u767c\u5c55\uff0c\u638c\u63e1\u9019\u4e9b\u6280\u5de7\u5c07\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0c\u6216\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8a73\u7d30\u8cc7\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MSSQL\u6e1b\u6642\u9593\u6cd5\uff0c\u8f15\u9b06\u627e\u56de\u73cd\u8cb4\u7684\u9858\u671b\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u8b93\u60a8\u7684\u6578\u64da\u7ba1\u7406\u66f4\u9ad8\u6548\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-65333","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/65333","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=65333"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/65333\/revisions"}],"predecessor-version":[{"id":65334,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/65333\/revisions\/65334"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=65333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=65333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=65333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}