{"id":138979,"date":"2024-10-31T17:12:19","date_gmt":"2024-10-31T09:12:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138979\/"},"modified":"2024-10-31T17:12:20","modified_gmt":"2024-10-31T09:12:20","slug":"sql-server%e5%8f%96%e5%be%97%e5%b9%b4%e4%bb%bd%e7%9a%84%e6%ba%96%e7%a2%ba%e6%96%b9%e6%b3%95%ef%bc%88sqlserver%e5%8f%96%e5%b9%b4%e4%bb%bd%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138979\/","title":{"rendered":"SQL Server\u53d6\u5f97\u5e74\u4efd\u7684\u6e96\u78ba\u65b9\u6cd5\uff08sqlserver\u53d6\u5e74\u4efd\uff09"},"content":{"rendered":"<h1 id=\"sql-server%e5%8f%96%e5%be%97%e5%b9%b4%e4%bb%bd%e7%9a%84%e6%ba%96%e7%a2%ba%e6%96%b9%e6%b3%95%ef%bc%88sqlserver%e5%8f%96%e5%b9%b4%e4%bb%bd%ef%bc%89-cjNvfCvudi\">SQL Server\u53d6\u5f97\u5e74\u4efd\u7684\u6e96\u78ba\u65b9\u6cd5\uff08sqlserver\u53d6\u5e74\u4efd\uff09<\/h1>\n<p>\u5728\u4f7f\u7528 SQL Server \u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u6642\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002\u7279\u5225\u662f\u5728\u9700\u8981\u5f9e\u65e5\u671f\u4e2d\u63d0\u53d6\u5e74\u4efd\u7684\u60c5\u6cc1\u4e0b\uff0c\u6b63\u78ba\u7684\u65b9\u6cd5\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u66f4\u6709\u6548\u5730\u9032\u884c\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728 SQL Server \u4e2d\u53d6\u5f97\u5e74\u4efd\u7684\u6e96\u78ba\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u7bc4\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"sql-server-%e4%b8%ad%e7%9a%84%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-cjNvfCvudi\">SQL Server \u4e2d\u7684\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u6578\u64da\u985e\u578b\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>DATE<\/code>\uff1a\u53ea\u5305\u542b\u65e5\u671f\uff0c\u683c\u5f0f\u70ba YYYY-MM-DD\u3002<\/li>\n<li><code>TIME<\/code>\uff1a\u53ea\u5305\u542b\u6642\u9593\uff0c\u683c\u5f0f\u70ba HH:MM:SS\u3002<\/li>\n<li><code>DATETIME<\/code>\uff1a\u540c\u6642\u5305\u542b\u65e5\u671f\u548c\u6642\u9593\uff0c\u7bc4\u570d\u5f9e 1753 \u5e74\u5230 9999 \u5e74\u3002<\/li>\n<li><code>DATETIME2<\/code>\uff1a\u64f4\u5c55\u7684\u65e5\u671f\u6642\u9593\u985e\u578b\uff0c\u652f\u6301\u66f4\u5927\u7684\u7bc4\u570d\u548c\u66f4\u9ad8\u7684\u7cbe\u5ea6\u3002<\/li>\n<li><code>SMALLDATETIME<\/code>\uff1a\u7bc4\u570d\u8f03\u5c0f\u7684\u65e5\u671f\u6642\u9593\u985e\u578b\uff0c\u7cbe\u5ea6\u8f03\u4f4e\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%8f%90%e5%8f%96%e5%b9%b4%e4%bb%bd%e7%9a%84%e6%96%b9%e6%b3%95-cjNvfCvudi\">\u63d0\u53d6\u5e74\u4efd\u7684\u65b9\u6cd5<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u63d0\u53d6\u5e74\u4efd\u7684\u6700\u5e38\u7528\u65b9\u6cd5\u662f\u4f7f\u7528 <code>YEAR()<\/code> \u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u53ef\u4ee5\u5f9e\u65e5\u671f\u6216\u65e5\u671f\u6642\u9593\u985e\u578b\u7684\u6578\u64da\u4e2d\u63d0\u53d6\u51fa\u5e74\u4efd\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 <code>YEAR()<\/code> \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>SELECT YEAR(\u65e5\u671f\u6b04\u4f4d) AS \u5e74\u4efd\nFROM \u8868\u683c\u540d\u7a31;<\/code><\/pre>\n<h3 id=\"%e7%af%84%e4%be%8b-cjNvfCvudi\">\u7bc4\u4f8b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>Orders<\/code> \u7684\u8868\u683c\uff0c\u5176\u4e2d\u6709\u4e00\u500b\u540d\u70ba <code>OrderDate<\/code> \u7684\u65e5\u671f\u6b04\u4f4d\u3002\u6211\u5011\u5e0c\u671b\u5f9e\u9019\u500b\u6b04\u4f4d\u4e2d\u63d0\u53d6\u51fa\u5e74\u4efd\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT YEAR(OrderDate) AS \u5e74\u4efd\nFROM Orders;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u8a02\u55ae\u7684\u5e74\u4efd\uff0c\u4e26\u4ee5 <code>\u5e74\u4efd<\/code> \u4f5c\u70ba\u5217\u540d\u3002<\/p>\n<h2 id=\"%e8%99%95%e7%90%86%e4%b8%8d%e5%90%8c%e6%a0%bc%e5%bc%8f%e7%9a%84%e6%97%a5%e6%9c%9f-cjNvfCvudi\">\u8655\u7406\u4e0d\u540c\u683c\u5f0f\u7684\u65e5\u671f<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u65e5\u671f\u53ef\u80fd\u4ee5\u5b57\u7b26\u4e32\u683c\u5f0f\u5b58\u5132\uff0c\u9019\u6642\u6211\u5011\u9700\u8981\u5148\u5c07\u5176\u8f49\u63db\u70ba\u65e5\u671f\u985e\u578b\u3002\u53ef\u4ee5\u4f7f\u7528 <code>CONVERT()<\/code> \u6216 <code>CAST()<\/code> \u51fd\u6578\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT YEAR(CONVERT(DATE, '2023-10-01')) AS \u5e74\u4efd;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de <code>2023<\/code>\uff0c\u56e0\u70ba\u6211\u5011\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u65e5\u671f\u683c\u5f0f\u5f8c\uff0c\u518d\u63d0\u53d6\u5e74\u4efd\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-cjNvfCvudi\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528 <code>YEAR()<\/code> \u51fd\u6578\u6642\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u65e5\u671f\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\u6b63\u78ba\u3002\u5982\u679c\u6578\u64da\u985e\u578b\u4e0d\u6b63\u78ba\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4\u6216\u4e0d\u6b63\u78ba\u7684\u7d50\u679c\u3002<\/li>\n<li>\u5c0d\u65bc\u7a7a\u503c\uff08NULL\uff09\uff0c<code>YEAR()<\/code> \u51fd\u6578\u5c07\u8fd4\u56de NULL\uff0c\u56e0\u6b64\u5728\u9032\u884c\u8a08\u7b97\u6642\u9700\u8981\u8003\u616e\u9019\u4e00\u9ede\u3002<\/li>\n<li>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u8003\u616e\u5230\u6027\u80fd\u554f\u984c\uff0c\u61c9\u8a72\u76e1\u91cf\u907f\u514d\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u51fd\u6578\uff0c\u7279\u5225\u662f\u5728 WHERE \u5b50\u53e5\u4e2d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-cjNvfCvudi\">\u7e3d\u7d50<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u4f7f\u7528 <code>YEAR()<\/code> \u51fd\u6578\u662f\u63d0\u53d6\u5e74\u4efd\u7684\u6700\u7c21\u55ae\u548c\u6700\u6709\u6548\u7684\u65b9\u6cd5\u3002\u7121\u8ad6\u662f\u5f9e\u65e5\u671f\u6b04\u4f4d\u9084\u662f\u5b57\u7b26\u4e32\u683c\u5f0f\u7684\u65e5\u671f\u4e2d\uff0c\u6211\u5011\u90fd\u53ef\u4ee5\u8f15\u9b06\u5730\u7372\u53d6\u6240\u9700\u7684\u5e74\u4efd\u3002\u4e86\u89e3\u5982\u4f55\u6b63\u78ba\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\uff0c\u5c0d\u65bc\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u7db2\u7ad9\u6258\u7ba1\uff0c\u6211\u5011\u7684\u670d\u52d9\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server\u4e2d\u7372\u53d6\u5e74\u4efd\u7684\u6e96\u78ba\u65b9\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528\u5167\u5efa\u51fd\u6578\u8f15\u9b06\u63d0\u53d6\u65e5\u671f\u4e2d\u7684\u5e74\u4efd\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-138979","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138979","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=138979"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138979\/revisions"}],"predecessor-version":[{"id":138980,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138979\/revisions\/138980"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}