ExampleTable+ID : int+StartDate : datetime+EndDate : datetime+GetHoursDiff() : int 在上面的类图中,ExampleTable类表示示例表,包含了ID、StartDate和EndDate属性,以及一个GetHoursDiff方法,用于计算相差的小时数。 结论 通过使用DATEDIFF函数,我们可以在 SQL Server 中计算两个日期之间相差的小时数。本文提供了...
SQL Server: DATEDIFF(unit, start_date, end_date) MySQL: DATEDIFF(end_date, start_date) PostgreSQL: EXTRACT(unit FROM age(end_date, start_date)) Oracle Database: end_date - start_date IBM Db2: DAYS(end_date) - DAYS(start_date) SQLite: The function is not standardized, but you can ...
Works in:SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse More Examples Example Return the difference between two date values, in months: SELECTDATEDIFF(month,'2017/08/25','2011/08/25')ASDateDiff; ...
DATEDIFF is a powerful SQL Server function that calculates the difference between two dates or datetimes, returning the result as aninteger. It’s super helpful when you need to find the age of something, like how many days old a user account is or the number of months between two events....
select dateadd(ms,-3,DATEADD(yy, DATEDIFF(yy,0,getdate() )+1, 0)) First Monday of the Month Ok, I am down to my last example. Here I am going to calculate the first Monday of the current month. Here is the code for that calculation. ...
See Server configuration: two digit year cutoff for information about two-digit year values. enddate See startdate. Return types int Return value The int difference between the startdate and enddate, expressed in the boundary set by datepart. For example, SELECT DATEDIFF(day, '2036-03-01', ...
This example calculates the number of day boundaries crossed between dates in two columns in a table. SQL CREATETABLEdbo.Duration ( startDate DATETIME2, endDate DATETIME2 );INSERTINTOdbo.Duration (startDate, endDate)VALUES('2007-05-06 12:10:09','2007-05-07 12:10:09');SELECTDATEDIFF(day...
In this example, user-defined variables serve as arguments forstartdateandenddate. SQL DECLARE@startdate DATETIME2 ='2007-05-05 12:10:09.3312722';DECLARE@enddate DATETIME2 ='2007-05-04 12:10:09.3312722';SELECTDATEDIFF(day, @startdate, @enddate); ...
Example 1: Find the difference between two dates In SQL Server: SELECT DATEDIFF(year, '2022-12-31', '2024-06-01') AS years_difference; Powered By Explanation: This calculates the difference in years between the two dates. Since the years 2023 and part of 2024 are counted, the result...
See Server configuration: two digit year cutoff for information about two-digit year values. enddate See startdate. Return types int Return value The int difference between the startdate and enddate, expressed in the boundary set by datepart. For example, SELECT DATEDIFF(day, '2036-03-01', ...