{"id":137883,"date":"2024-10-31T12:53:24","date_gmt":"2024-10-31T04:53:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/137883\/"},"modified":"2024-10-31T12:53:25","modified_gmt":"2024-10-31T04:53:25","slug":"sql-server%e6%97%a5%e6%9c%9f%e6%93%8d%e4%bd%9c%e5%85%a8%e6%8e%a5%e8%a7%b8%ef%bc%8c%e5%98%bb%e5%98%bb","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/137883\/","title":{"rendered":"SQL Server\u65e5\u671f\u64cd\u4f5c\u5168\u63a5\u89f8\uff0c\u563b\u563b"},"content":{"rendered":"<h1 id=\"sql-server%e6%97%a5%e6%9c%9f%e6%93%8d%e4%bd%9c%e5%85%a8%e6%8e%a5%e8%a7%b8%ef%bc%8c%e5%98%bb%e5%98%bb-zwmeLSwQRE\">SQL Server\u65e5\u671f\u64cd\u4f5c\u5168\u63a5\u89f8\uff0c\u563b\u563b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u64cd\u4f5c\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\uff0c\u9019\u4e9b\u529f\u80fd\u4e0d\u50c5\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u9032\u884c\u6578\u64da\u5206\u6790\uff0c\u9084\u80fd\u5920\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSQL Server\u4e2d\u7684\u65e5\u671f\u64cd\u4f5c\uff0c\u5305\u62ec\u65e5\u671f\u985e\u578b\u3001\u5e38\u7528\u51fd\u6578\u53ca\u5176\u61c9\u7528\u793a\u4f8b\u3002<\/p>\n<h2 id=\"1-sql-server%e4%b8%ad%e7%9a%84%e6%97%a5%e6%9c%9f%e9%a1%9e%e5%9e%8b-zwmeLSwQRE\">1. SQL Server\u4e2d\u7684\u65e5\u671f\u985e\u578b<\/h2>\n<p>SQL Server\u652f\u6301\u591a\u7a2e\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u985e\u578b\uff0c\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>DATE<\/strong>\uff1a\u53ea\u5b58\u5132\u65e5\u671f\uff0c\u7bc4\u570d\u5f9e &#8216;0001-01-01&#8217; \u5230 &#8216;9999-12-31&#8217;\u3002<\/li>\n<li><strong>TIME<\/strong>\uff1a\u53ea\u5b58\u5132\u6642\u9593\uff0c\u7bc4\u570d\u5f9e &#8217;00:00:00.0000000&#8242; \u5230 &#8217;23:59:59.9999999&#8217;\u3002<\/li>\n<li><strong>DATETIME<\/strong>\uff1a\u540c\u6642\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u7bc4\u570d\u5f9e &#8216;1753-01-01&#8217; \u5230 &#8216;9999-12-31&#8217;\u3002<\/li>\n<li><strong>DATETIME2<\/strong>\uff1a\u6bd4DATETIME\u66f4\u7cbe\u78ba\uff0c\u7bc4\u570d\u5f9e &#8216;0001-01-01&#8217; \u5230 &#8216;9999-12-31&#8217;\uff0c\u7cbe\u5ea6\u53ef\u9054\u5230100\u7d0d\u79d2\u3002<\/li>\n<li><strong>SMALLDATETIME<\/strong>\uff1a\u7bc4\u570d\u5f9e &#8216;1900-01-01&#8217; \u5230 &#8216;2079-06-06&#8217;\uff0c\u7cbe\u5ea6\u70ba1\u5206\u9418\u3002<\/li>\n<li><strong>DATETIMEOFFSET<\/strong>\uff1a\u5b58\u5132\u5e36\u6709\u6642\u5340\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e5%b8%b8%e7%94%a8%e6%97%a5%e6%9c%9f%e5%87%bd%e6%95%b8-zwmeLSwQRE\">2. \u5e38\u7528\u65e5\u671f\u51fd\u6578<\/h2>\n<p>SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u5167\u5efa\u51fd\u6578\u4f86\u64cd\u4f5c\u65e5\u671f\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u51fd\u6578\uff1a<\/p>\n<ul>\n<li><strong>GETDATE()<\/strong>\uff1a\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/li>\n<li><strong>SYSDATETIME()<\/strong>\uff1a\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u7cbe\u5ea6\u66f4\u9ad8\u3002<\/li>\n<li><strong>DATEADD()<\/strong>\uff1a\u5728\u6307\u5b9a\u7684\u65e5\u671f\u4e0a\u6dfb\u52a0\u4e00\u6bb5\u6642\u9593\u3002<\/li>\n<li><strong>DATEDIFF()<\/strong>\uff1a\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3002<\/li>\n<li><strong>FORMAT()<\/strong>\uff1a\u683c\u5f0f\u5316\u65e5\u671f\u548c\u6642\u9593\u7684\u986f\u793a\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n<h3 id=\"2-1-dateadd%e5%87%bd%e6%95%b8%e7%a4%ba%e4%be%8b-zwmeLSwQRE\">2.1 DATEADD\u51fd\u6578\u793a\u4f8b<\/h3>\n<pre><code>\n-- \u5728\u7576\u524d\u65e5\u671f\u4e0a\u6dfb\u52a07\u5929\nSELECT DATEADD(DAY, 7, GETDATE()) AS NewDate;\n<\/code><\/pre>\n<h3 id=\"2-2-datediff%e5%87%bd%e6%95%b8%e7%a4%ba%e4%be%8b-zwmeLSwQRE\">2.2 DATEDIFF\u51fd\u6578\u793a\u4f8b<\/h3>\n<pre><code>\n-- \u8a08\u7b97\u4eca\u5929\u82072023\u5e741\u67081\u65e5\u4e4b\u9593\u7684\u5929\u6578\nSELECT DATEDIFF(DAY, '2023-01-01', GETDATE()) AS DaysDifference;\n<\/code><\/pre>\n<h2 id=\"3-%e6%97%a5%e6%9c%9f%e6%a0%bc%e5%bc%8f%e5%8c%96-zwmeLSwQRE\">3. \u65e5\u671f\u683c\u5f0f\u5316<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u4f7f\u7528FORMAT\u51fd\u6578\u53ef\u4ee5\u5c07\u65e5\u671f\u683c\u5f0f\u5316\u70ba\u4e0d\u540c\u7684\u986f\u793a\u65b9\u5f0f\u3002\u9019\u5c0d\u65bc\u5831\u544a\u548c\u6578\u64da\u5c55\u793a\u975e\u5e38\u6709\u7528\u3002<\/p>\n<pre><code>\n-- \u5c07\u7576\u524d\u65e5\u671f\u683c\u5f0f\u5316\u70ba 'yyyy-MM-dd' \u683c\u5f0f\nSELECT FORMAT(GETDATE(), 'yyyy-MM-dd') AS FormattedDate;\n<\/code><\/pre>\n<h2 id=\"4-%e6%97%a5%e6%9c%9f%e7%9a%84%e6%af%94%e8%bc%83-zwmeLSwQRE\">4. \u65e5\u671f\u7684\u6bd4\u8f03<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u6bd4\u8f03\u904b\u7b97\u7b26\uff08\u5982 =, &lt;, &gt;\uff09\u4f86\u6bd4\u8f03\u65e5\u671f\u3002\u9019\u5728\u67e5\u8a62\u6578\u64da\u6642\u975e\u5e38\u5e38\u898b\u3002<\/p>\n<pre><code>\n-- \u67e5\u8a622023\u5e741\u67081\u65e5\u4e4b\u5f8c\u7684\u6240\u6709\u8a18\u9304\nSELECT * FROM YourTable WHERE YourDateColumn &gt; '2023-01-01';\n<\/code><\/pre>\n<h2 id=\"5-%e5%b0%8f%e7%b5%90-zwmeLSwQRE\">5. \u5c0f\u7d50<\/h2>\n<p>SQL Server\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u65e5\u671f\u548c\u6642\u9593\u64cd\u4f5c\u529f\u80fd\uff0c\u7121\u8ad6\u662f\u57fa\u672c\u7684\u65e5\u671f\u985e\u578b\u9084\u662f\u8907\u96dc\u7684\u65e5\u671f\u51fd\u6578\uff0c\u90fd\u80fd\u5920\u6eff\u8db3\u65e5\u5e38\u6578\u64da\u8655\u7406\u7684\u9700\u6c42\u3002\u638c\u63e1\u9019\u4e9b\u64cd\u4f5c\u4e0d\u50c5\u80fd\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u548c\u5206\u6790\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u96f2\u7aef\u74b0\u5883\u4e2d\u904b\u884cSQL Server\u6709\u8208\u8da3\uff0c\u6216\u8005\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/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>\u638c\u63e1SQL Server\u65e5\u671f\u64cd\u4f5c\u7684\u6280\u5de7\u8207\u65b9\u6cd5\uff0c\u8f15\u9b06\u8655\u7406\u65e5\u671f\u8207\u6642\u9593\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u8b93\u4f60\u4e8b\u534a\u529f\u500d\uff01\u563b\u563b\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-137883","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/137883","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=137883"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/137883\/revisions"}],"predecessor-version":[{"id":137884,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/137883\/revisions\/137884"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=137883"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=137883"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=137883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}