{"id":168493,"date":"2024-11-06T12:50:27","date_gmt":"2024-11-06T04:50:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168493\/"},"modified":"2024-11-06T12:50:28","modified_gmt":"2024-11-06T04:50:28","slug":"sql-%e4%b8%ad-datediff-%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168493\/","title":{"rendered":"SQL \u4e2d DateDiff \u51fd\u6578\u7684\u4f7f\u7528"},"content":{"rendered":"<h1 id=\"sql-%e4%b8%ad-datediff-%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8-VjKIpZlQYG\">SQL \u4e2d DateDiff \u51fd\u6578\u7684\u4f7f\u7528<\/h1>\n<p>\u5728 SQL \u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u662f\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u90e8\u5206\u3002\u7121\u8ad6\u662f\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\uff0c\u9084\u662f\u9032\u884c\u6642\u9593\u7684\u52a0\u6e1b\uff0c\u6b63\u78ba\u4f7f\u7528\u65e5\u671f\u51fd\u6578\u90fd\u80fd\u63d0\u9ad8\u6578\u64da\u67e5\u8a62\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002\u672c\u6587\u5c07\u91cd\u9ede\u4ecb\u7d39 SQL \u4e2d\u7684 <code>DateDiff<\/code> \u51fd\u6578\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u4f86\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5176\u7528\u6cd5\u3002<\/p>\n<h2 id=\"datediff-%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-VjKIpZlQYG\">DateDiff \u51fd\u6578\u6982\u8ff0<\/h2>\n<p><code>DateDiff<\/code> \u51fd\u6578\u7528\u65bc\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u6574\u6578\u503c\uff0c\u8868\u793a\u9019\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u6642\u9593\u9593\u9694\u3002\u9019\u500b\u51fd\u6578\u901a\u5e38\u7528\u65bc\u5831\u544a\u751f\u6210\u3001\u6578\u64da\u5206\u6790\u548c\u6642\u9593\u7ba1\u7406\u7b49\u5834\u666f\u3002<\/p>\n<h3 id=\"%e8%aa%9e%e6%b3%95-VjKIpZlQYG\">\u8a9e\u6cd5<\/h3>\n<pre><code>DateDiff(datepart, startdate, enddate)\n<\/code><\/pre>\n<ul>\n<li><strong>datepart<\/strong>: \u6307\u5b9a\u8981\u8a08\u7b97\u7684\u6642\u9593\u55ae\u4f4d\uff0c\u4f8b\u5982\u5e74\u3001\u6708\u3001\u65e5\u3001\u6642\u3001\u5206\u3001\u79d2\u7b49\u3002<\/li>\n<li><strong>startdate<\/strong>: \u958b\u59cb\u65e5\u671f\u3002<\/li>\n<li><strong>enddate<\/strong>: \u7d50\u675f\u65e5\u671f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%b8%b8%e7%94%a8%e7%9a%84-datepart-%e5%8f%83%e6%95%b8-VjKIpZlQYG\">\u5e38\u7528\u7684 datepart \u53c3\u6578<\/h2>\n<p>\u5728\u4f7f\u7528 <code>DateDiff<\/code> \u51fd\u6578\u6642\uff0c<code>datepart<\/code> \u53c3\u6578\u53ef\u4ee5\u662f\u4ee5\u4e0b\u5e7e\u7a2e\u5e38\u7528\u7684\u6642\u9593\u55ae\u4f4d\uff1a<\/p>\n<ul>\n<li><code>YEAR<\/code>: \u5e74<\/li>\n<li><code>MONTH<\/code>: \u6708<\/li>\n<li><code>DAY<\/code>: \u65e5<\/li>\n<li><code>HOUR<\/code>: \u5c0f\u6642<\/li>\n<li><code>MINUTE<\/code>: \u5206\u9418<\/li>\n<li><code>SECOND<\/code>: \u79d2<\/li>\n<\/ul>\n<h2 id=\"%e7%af%84%e4%be%8b-VjKIpZlQYG\">\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 <code>DateDiff<\/code> \u51fd\u6578\u7684\u7bc4\u4f8b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5176\u7528\u6cd5\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-1-%e8%a8%88%e7%ae%97%e5%85%a9%e5%80%8b%e6%97%a5%e6%9c%9f%e4%b9%8b%e9%96%93%e7%9a%84%e5%a4%a9%e6%95%b8-VjKIpZlQYG\">\u7bc4\u4f8b 1: \u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578<\/h3>\n<pre><code>SELECT DATEDIFF(DAY, '2023-01-01', '2023-01-31') AS DaysDifference;\n<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de 30\uff0c\u8868\u793a\u5f9e 2023 \u5e74 1 \u6708 1 \u65e5\u5230 2023 \u5e74 1 \u6708 31 \u65e5\u4e4b\u9593\u6709 30 \u5929\u7684\u5dee\u7570\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-2-%e8%a8%88%e7%ae%97%e5%85%a9%e5%80%8b%e6%97%a5%e6%9c%9f%e4%b9%8b%e9%96%93%e7%9a%84%e6%9c%88%e4%bb%bd-VjKIpZlQYG\">\u7bc4\u4f8b 2: \u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u6708\u4efd<\/h3>\n<pre><code>SELECT DATEDIFF(MONTH, '2023-01-01', '2023-12-31') AS MonthsDifference;\n<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de 11\uff0c\u8868\u793a\u5f9e 2023 \u5e74 1 \u6708\u5230 2023 \u5e74 12 \u6708\u4e4b\u9593\u6709 11 \u500b\u5b8c\u6574\u7684\u6708\u4efd\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b-3-%e8%a8%88%e7%ae%97%e5%85%a9%e5%80%8b%e6%97%a5%e6%9c%9f%e4%b9%8b%e9%96%93%e7%9a%84%e5%b9%b4%e4%bb%bd-VjKIpZlQYG\">\u7bc4\u4f8b 3: \u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5e74\u4efd<\/h3>\n<pre><code>SELECT DATEDIFF(YEAR, '2000-01-01', '2023-01-01') AS YearsDifference;\n<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de 23\uff0c\u8868\u793a\u5f9e 2000 \u5e74\u5230 2023 \u5e74\u4e4b\u9593\u6709 23 \u5e74\u7684\u5dee\u7570\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-VjKIpZlQYG\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528 <code>DateDiff<\/code> \u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u65e5\u671f\u683c\u5f0f\u5fc5\u9808\u6b63\u78ba\uff0c\u5426\u5247\u53ef\u80fd\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li>\u8a08\u7b97\u7684\u7d50\u679c\u662f\u6574\u6578\uff0c\u8868\u793a\u5b8c\u6574\u7684\u6642\u9593\u55ae\u4f4d\u5dee\u7570\u3002<\/li>\n<li>\u4e0d\u540c\u7684 SQL \u6578\u64da\u5eab\u7cfb\u7d71\u53ef\u80fd\u5c0d <code>DateDiff<\/code> \u51fd\u6578\u7684\u5be6\u73fe\u6709\u6240\u4e0d\u540c\uff0c\u4f7f\u7528\u6642\u9700\u53c3\u8003\u76f8\u61c9\u7684\u6587\u6a94\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-VjKIpZlQYG\">\u7e3d\u7d50<\/h2>\n<p>SQL \u4e2d\u7684 <code>DateDiff<\/code> \u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u8f15\u9b06\u8a08\u7b97\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u5206\u6790\u9084\u662f\u5831\u544a\u751f\u6210\u4e2d\uff0c\u6b63\u78ba\u4f7f\u7528\u9019\u500b\u51fd\u6578\u90fd\u80fd\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u65e5\u671f\u6578\u64da\u7684\u61c9\u7528\u5834\u666f\uff0c\u4e86\u89e3\u5982\u4f55\u4f7f\u7528 <code>DateDiff<\/code> \u51fd\u6578\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f VPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0c\u6216\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\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>\u4e86\u89e3 SQL \u4e2d DateDiff \u51fd\u6578\u7684\u7528\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u8a08\u7b97\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\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-168493","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168493","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=168493"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168493\/revisions"}],"predecessor-version":[{"id":168494,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168493\/revisions\/168494"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}