What is the equivalent of Oracle's LAST_DAY() function in SQL Server 2008?

问题

I have used the LAST_DAY() function in Oracle like this:

Last_Day( to_date( '$pay_first_day' , 'YYYY-mm-dd') )

What do i have to do in SQL server 2008 R2 database to achieve the same result?

回答1:

Try this one -

DECLARE @Date DATETIME
SELECT @Date = GETDATE()

SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, @Date) + 1, 0) - 1

回答2:

-- Wrapping the answer in a function for seamless transition.

CREATE FUNCTION [dbo].[LAST_DAY]
(
    @inDate DATETIME
)
RETURNS DATETIME
AS
BEGIN
    RETURN DATEADD(MONTH, DATEDIFF(MONTH, 0, @inDate) + 1, 0) - 1
END
-- TO TEST:  SELECT dbo.LAST_DAY(getDate()) as LastDayOfThisMonth

-- note: Please mark as answer if this helps you better then the one before.

回答3:

SQL Server 2012 introduces a new date function called EOMONTH which returns the last day of the month that contains the specified date, with an optional offset.

EOMONTH ( <start_date> [, <month_to_add> ] )

For instance
select EOMONTH('01/07/2018')  
Would return
2018-01-31

回答4:

Could you please try this, it should work as expected :

SELECT DATEADD (DAY, -1, DATEADD (MONTH, DATEDIFF (MONTH, 0, '$pay_first_day') + 1, 0))

It would return the last day equivalent of the given date in this format : '2013-02-28 00:00:00.000' if your $pay_first_day is in February, and it would return '2013-04-30 00:00:00.000' if your $pay_first_day is in April.

回答5:

Here are two UDF for begin and end of month.

CREATE FUNCTION dbo.End_of_month (@Date datetime)  
RETURNS datetime AS  
BEGIN 
     DECLARE @ret datetime
     SET @Ret=DATEADD(DAY,-DAY(@Date)+1,@Date);
     SET @Ret=DATEADD(Month,1,@Ret);
     SET @Ret=DATEADD(Day,-1,@Ret);
     RETURN(@Ret)
END

CREATE FUNCTION dbo.Begin_of_month (@Date datetime)  
RETURNS datetime AS  
BEGIN 
     DECLARE @ret datetime
     SET @Ret=DATEADD(DAY,-DAY(@Date)+1,@Date);
     RETURN(@Ret)
END

来源：https://stackoverflow.com/questions/16277504/what-is-the-equivalent-of-oracles-last-day-function-in-sql-server-2008

标签

sql-server

sql-server-2008-r2