{"id":137331,"date":"2024-10-31T12:18:20","date_gmt":"2024-10-31T04:18:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/137331\/"},"modified":"2024-10-31T12:18:20","modified_gmt":"2024-10-31T04:18:20","slug":"sql-server-datetime%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e7%9a%84%e5%8f%a6%e9%a1%9e%e8%a7%a3%e8%ae%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/137331\/","title":{"rendered":"SQL Server DateTime\u6578\u64da\u985e\u578b\u7684\u53e6\u985e\u89e3\u8b80"},"content":{"rendered":"

SQL Server DateTime\u6578\u64da\u985e\u578b\u7684\u53e6\u985e\u89e3\u8b80<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002SQL Server\u4f5c\u70ba\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u985e\u578b\u4f86\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u4fbf\u662fDateTime\u6578\u64da\u985e\u578b\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSQL Server\u4e2d\u7684DateTime\u6578\u64da\u985e\u578b\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u53e6\u985e\u7684\u89e3\u8b80\u548c\u4f7f\u7528\u5efa\u8b70\u3002<\/p>\n

DateTime\u6578\u64da\u985e\u578b\u6982\u8ff0<\/h2>\n

SQL Server\u7684DateTime\u6578\u64da\u985e\u578b\u7528\u65bc\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u7bc4\u570d\u5f9e1753\u5e741\u67081\u65e5\u52309999\u5e7412\u670831\u65e5\uff0c\u7cbe\u5ea6\u70ba3.33\u6beb\u79d2\u3002\u9019\u610f\u5473\u8457\uff0cDateTime\u6578\u64da\u985e\u578b\u53ef\u4ee5\u7cbe\u78ba\u5230\u79d2\uff0c\u4f46\u7121\u6cd5\u7cbe\u78ba\u5230\u6beb\u79d2\u4ee5\u4e0b\u7684\u6642\u9593\u3002<\/p>\n

\u57fa\u672c\u8a9e\u6cd5<\/h3>\n

\u5728SQL Server\u4e2d\uff0c\u4f7f\u7528DateTime\u6578\u64da\u985e\u578b\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

CREATE TABLE Events (\n    EventID INT PRIMARY KEY,\n    EventName NVARCHAR(100),\n    EventDate DATETIME\n);<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70baEvents\u7684\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u500bEventDate\u6b04\u4f4d\uff0c\u8a72\u6b04\u4f4d\u7684\u6578\u64da\u985e\u578b\u70baDateTime\u3002<\/p>\n
DateTime\u7684\u53e6\u985e\u89e3\u8b80<\/h2>\n
\u96d6\u7136DateTime\u6578\u64da\u985e\u578b\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\u90fd\u80fd\u6eff\u8db3\u9700\u6c42\uff0c\u4f46\u5728\u67d0\u4e9b\u7279\u5b9a\u60c5\u5883\u4e0b\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u767c\u73fe\u5176\u5c40\u9650\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u53e6\u985e\u7684\u89e3\u8b80\u548c\u4f7f\u7528\u5efa\u8b70\uff1a<\/p>\n
1. \u6642\u5340\u554f\u984c<\/h3>\n
SQL Server\u7684DateTime\u6578\u64da\u985e\u578b\u4e26\u4e0d\u5b58\u5132\u6642\u5340\u4fe1\u606f\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u5728\u8de8\u6642\u5340\u61c9\u7528\u4e2d\u51fa\u73fe\u554f\u984c\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528DateTimeOffset\u6578\u64da\u985e\u578b\uff0c\u8a72\u985e\u578b\u4e0d\u50c5\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\uff0c\u9084\u5305\u62ec\u6642\u5340\u504f\u79fb\u91cf\u3002<\/p>\n
CREATE TABLE Events (\n    EventID INT PRIMARY KEY,\n    EventName NVARCHAR(100),\n    EventDate DATETIMEOFFSET\n);<\/code><\/pre>\n
2. \u7cbe\u5ea6\u9650\u5236<\/h3>\n
\u5982\u524d\u6240\u8ff0\uff0cDateTime\u7684\u7cbe\u5ea6\u70ba3.33\u6beb\u79d2\uff0c\u9019\u5728\u67d0\u4e9b\u9ad8\u983b\u4ea4\u6613\u6216\u79d1\u5b78\u8a08\u7b97\u7684\u61c9\u7528\u4e2d\u53ef\u80fd\u4e0d\u5920\u7528\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528DateTime2\u6578\u64da\u985e\u578b\uff0c\u8a72\u985e\u578b\u63d0\u4f9b\u66f4\u9ad8\u7684\u7cbe\u5ea6\uff0c\u7bc4\u570d\u5f9e0001\u5e74\u52309999\u5e74\uff0c\u4e26\u4e14\u53ef\u4ee5\u7cbe\u78ba\u5230100\u7d0d\u79d2\u3002<\/p>\n
CREATE TABLE HighPrecisionEvents (\n    EventID INT PRIMARY KEY,\n    EventName NVARCHAR(100),\n    EventDate DATETIME2(7) -- \u7cbe\u5ea6\u70ba7\uff0c\u8868\u793a\u53ef\u7cbe\u78ba\u5230100\u7d0d\u79d2\n);<\/code><\/pre>\n
3. \u65e5\u671f\u8a08\u7b97\u7684\u6311\u6230<\/h3>\n
\u5728\u9032\u884c\u65e5\u671f\u8a08\u7b97\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u7279\u5225\u6ce8\u610fLeap Year\uff08\u958f\u5e74\uff09\u548c\u4e0d\u540c\u6708\u4efd\u7684\u5929\u6578\u3002\u4f7f\u7528\u5167\u5efa\u7684\u65e5\u671f\u51fd\u6578\uff0c\u5982DATEDIFF\u548cDATEADD\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7c21\u5316\u9019\u4e9b\u8a08\u7b97\u3002<\/p>\n
-- \u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\nSELECT DATEDIFF(DAY, '2023-01-01', '2023-12-31') AS DaysBetween;<\/code><\/pre>\n
\u7d50\u8ad6<\/h2>\n
SQL Server\u7684DateTime\u6578\u64da\u985e\u578b\u5728\u8a31\u591a\u61c9\u7528\u4e2d\u90fd\u80fd\u5920\u6709\u6548\u5730\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u5176\u5c40\u9650\u6027\u53ef\u80fd\u6703\u5f71\u97ff\u61c9\u7528\u7684\u6027\u80fd\u548c\u6e96\u78ba\u6027\u3002\u4e86\u89e3\u9019\u4e9b\u5c40\u9650\u6027\u4e26\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\uff0c\u5982DateTimeOffset\u6216DateTime2\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002<\/p>\n
\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc\u9999\u6e2fVPS<\/a><\/code>\u6216\u4e91\u670d\u52a1\u5668<\/a><\/code>\u6709\u8208\u8da3\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22SQL Server DateTime\u6578\u64da\u985e\u578b\u7684\u53e6\u985e\u89e3\u8b80\uff0c\u6df1\u5165\u4e86\u89e3\u5176\u7279\u6027\u3001\u61c9\u7528\u53ca\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\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-137331","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/137331","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=137331"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/137331\/revisions"}],"predecessor-version":[{"id":137332,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/137331\/revisions\/137332"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=137331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=137331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=137331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}