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休眠-两个日期之间的差额

[英]Hibernate - difference between two dates

原文 2014-01-22 15:12:26 5 2 mysql/ sql-server/ hibernate/ h2

我如何计算两个日期之间的差异，以使查询与：MySql，H2和SqlServer兼容？

2 个解决方案

SQL DATEDIFF您可以使用DATEDIFF函数，该函数返回指定DATEPART差异

SELECT DATEDIFF(dd,'1/20/2014,'1/22/2014')

http://technet.microsoft.com/zh-CN/library/ms189794.aspx

MySQL- DATEDIFF()稍有不同，

SELECT DATEDIFF('2008-11-30','2008-11-29') AS DiffDate

http://dev.mysql.com/doc/refman/5.1/zh-CN/date-and-time-functions.html#function_datediff

H2- DATEDIFF

DATEDIFF('YEAR', T1.CREATED, T2.CREATED)

http://www.h2database.com/html/functions.html#datediff

在SQL Server中-

  datediff (day,startdate,enddate)

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