{"id":66355,"date":"2024-10-14T16:46:16","date_gmt":"2024-10-14T08:46:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66355\/"},"modified":"2024-10-14T16:46:16","modified_gmt":"2024-10-14T08:46:16","slug":"mssql%e4%b8%ad%e5%a6%82%e4%bd%95%e6%9f%a5%e8%a9%a2%e6%99%82%e9%96%93%e4%bf%a1%e6%81%af%ef%bc%88mssql%e6%80%8e%e9%ba%bc%e6%9f%a5%e8%a9%a2%e6%99%82%e9%96%93%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66355\/","title":{"rendered":"MSSQL\u4e2d\u5982\u4f55\u67e5\u8a62\u6642\u9593\u4fe1\u606f\uff08mssql\u600e\u9ebc\u67e5\u8a62\u6642\u9593\uff09"},"content":{"rendered":"<h1 id=\"mssql%e4%b8%ad%e5%a6%82%e4%bd%95%e6%9f%a5%e8%a9%a2%e6%99%82%e9%96%93%e4%bf%a1%e6%81%af%ef%bc%88mssql%e6%80%8e%e9%ba%bc%e6%9f%a5%e8%a9%a2%e6%99%82%e9%96%93%ef%bc%89-gGKTMijizl\">MSSQL\u4e2d\u5982\u4f55\u67e5\u8a62\u6642\u9593\u4fe1\u606f\uff08mssql\u600e\u9ebc\u67e5\u8a62\u6642\u9593\uff09<\/h1>\n<p>\u5728\u4f7f\u7528Microsoft SQL Server\uff08MSSQL\uff09\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u6642\uff0c\u6642\u9593\u4fe1\u606f\u7684\u67e5\u8a62\u662f\u4e00\u500b\u5e38\u898b\u4e14\u91cd\u8981\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u7528\u65bc\u5831\u544a\u3001\u6578\u64da\u5206\u6790\u9084\u662f\u65e5\u5e38\u64cd\u4f5c\uff0c\u6b63\u78ba\u5730\u67e5\u8a62\u548c\u8655\u7406\u6642\u9593\u6578\u64da\u90fd\u80fd\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7406\u89e3\u548c\u5229\u7528\u6578\u64da\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728MSSQL\u4e2d\u67e5\u8a62\u6642\u9593\u4fe1\u606f\uff0c\u5305\u62ec\u5e38\u7528\u7684\u6642\u9593\u51fd\u6578\u548c\u67e5\u8a62\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e6%99%82%e9%96%93%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-gGKTMijizl\">\u6642\u9593\u6578\u64da\u985e\u578b<\/h2>\n<p>MSSQL\u652f\u6301\u591a\u7a2e\u6642\u9593\u6578\u64da\u985e\u578b\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>DATETIME<\/code>\uff1a\u5305\u542b\u65e5\u671f\u548c\u6642\u9593\uff0c\u7cbe\u5ea6\u70ba3.33\u6beb\u79d2\u3002<\/li>\n<li><code>SMALLDATETIME<\/code>\uff1a\u5305\u542b\u65e5\u671f\u548c\u6642\u9593\uff0c\u7cbe\u5ea6\u70ba1\u5206\u9418\uff0c\u7bc4\u570d\u8f03\u5c0f\u3002<\/li>\n<li><code>DATE<\/code>\uff1a\u50c5\u5305\u542b\u65e5\u671f\uff0c\u7121\u6642\u9593\u90e8\u5206\u3002<\/li>\n<li><code>TIME<\/code>\uff1a\u50c5\u5305\u542b\u6642\u9593\uff0c\u7121\u65e5\u671f\u90e8\u5206\u3002<\/li>\n<li><code>DATETIME2<\/code>\uff1a\u64f4\u5c55\u7684\u65e5\u671f\u6642\u9593\u985e\u578b\uff0c\u652f\u6301\u66f4\u9ad8\u7684\u7cbe\u5ea6\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e7%95%b6%e5%89%8d%e6%99%82%e9%96%93-gGKTMijizl\">\u67e5\u8a62\u7576\u524d\u6642\u9593<\/h2>\n<p>\u5728MSSQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6578\u4f86\u67e5\u8a62\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff1a<\/p>\n<pre><code>SELECT GETDATE();<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u683c\u5f0f\u70ba<code>YYYY-MM-DD HH:MM:SS<\/code>\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e7%89%b9%e5%ae%9a%e6%99%82%e9%96%93%e7%af%84%e5%9c%8d%e7%9a%84%e6%95%b8%e6%93%9a-gGKTMijizl\">\u67e5\u8a62\u7279\u5b9a\u6642\u9593\u7bc4\u570d\u7684\u6578\u64da<\/h2>\n<p>\u5982\u679c\u9700\u8981\u67e5\u8a62\u7279\u5b9a\u6642\u9593\u7bc4\u570d\u5167\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528<code>WHERE<\/code>\u5b50\u53e5\u4f86\u904e\u6ffe\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u540d\u70ba<code>Orders<\/code>\u7684\u8868\uff0c\u4e26\u4e14\u5e0c\u671b\u67e5\u8a62\u57282023\u5e741\u67081\u65e5\u81f32023\u5e741\u670831\u65e5\u4e4b\u9593\u7684\u6240\u6709\u8a02\u55ae\uff1a<\/p>\n<pre><code>SELECT * FROM Orders\nWHERE OrderDate BETWEEN '2023-01-01' AND '2023-01-31';<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8-gGKTMijizl\">\u4f7f\u7528\u6642\u9593\u51fd\u6578<\/h2>\n<p>MSSQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u6642\u9593\u51fd\u6578\uff0c\u53ef\u4ee5\u7528\u4f86\u9032\u884c\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u6642\u9593\u51fd\u6578\uff1a<\/p>\n<ul>\n<li><code>YEAR()<\/code>\uff1a\u63d0\u53d6\u5e74\u4efd\u3002<\/li>\n<li><code>MONTH()<\/code>\uff1a\u63d0\u53d6\u6708\u4efd\u3002<\/li>\n<li><code>DAY()<\/code>\uff1a\u63d0\u53d6\u65e5\u671f\u3002<\/li>\n<li><code>DATEDIFF()<\/code>\uff1a\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3002<\/li>\n<li><code>DATEADD()<\/code>\uff1a\u5728\u6307\u5b9a\u7684\u65e5\u671f\u4e0a\u6dfb\u52a0\u6642\u9593\u9593\u9694\u3002<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a622023\u5e74\u6240\u6709\u8a02\u55ae\u7684\u6578\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT COUNT(*) FROM Orders\nWHERE YEAR(OrderDate) = 2023;<\/code><\/pre>\n<h2 id=\"%e6%a0%bc%e5%bc%8f%e5%8c%96%e6%99%82%e9%96%93%e8%bc%b8%e5%87%ba-gGKTMijizl\">\u683c\u5f0f\u5316\u6642\u9593\u8f38\u51fa<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u5c07\u6642\u9593\u683c\u5f0f\u5316\u70ba\u7279\u5b9a\u7684\u986f\u793a\u683c\u5f0f\u3002\u53ef\u4ee5\u4f7f\u7528<code>FORMAT()<\/code>\u51fd\u6578\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5c07\u65e5\u671f\u683c\u5f0f\u5316\u70ba<code>DD\/MM\/YYYY<\/code>\uff1a<\/p>\n<pre><code>SELECT FORMAT(OrderDate, 'dd\/MM\/yyyy') AS FormattedDate\nFROM Orders;<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-gGKTMijizl\">\u7d50\u8ad6<\/h2>\n<p>\u5728MSSQL\u4e2d\u67e5\u8a62\u6642\u9593\u4fe1\u606f\u662f\u4e00\u9805\u57fa\u672c\u800c\u91cd\u8981\u7684\u6280\u80fd\u3002\u901a\u904e\u4e86\u89e3\u6642\u9593\u6578\u64da\u985e\u578b\u3001\u4f7f\u7528\u5167\u5efa\u51fd\u6578\u4ee5\u53ca\u638c\u63e1\u67e5\u8a62\u6280\u5de7\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u5206\u6790\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u67e5\u8a62\u7576\u524d\u6642\u9593\u3001\u7279\u5b9a\u6642\u9593\u7bc4\u570d\u7684\u6578\u64da\uff0c\u9084\u662f\u9032\u884c\u6642\u9593\u683c\u5f0f\u5316\uff0c\u9019\u4e9b\u6280\u5de7\u90fd\u80fd\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u5229\u7528MSSQL\u7684\u5f37\u5927\u529f\u80fd\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728MSSQL\u4e2d\u9032\u884c\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u6578\u64da\u5eab\u64cd\u4f5c\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728MSSQL\u4e2d\u67e5\u8a62\u6642\u9593\u4fe1\u606f\uff0c\u638c\u63e1\u65e5\u671f\u548c\u6642\u9593\u51fd\u6578\u7684\u4f7f\u7528\uff0c\u8f15\u9b06\u7372\u53d6\u6240\u9700\u7684\u6642\u9593\u6578\u64da\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-66355","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66355","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=66355"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66355\/revisions"}],"predecessor-version":[{"id":66356,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66355\/revisions\/66356"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}