Question

I am using SQL Server 2005.

In one of my stored procedure, I have a parameter called @pstatDate of type DateTime.

I have to simple update the datePart of the Parameter to Lastday of that month.

For example if the date is Apr 23 2012 2:15PM I need it update it to Apr 30 2012 2:15PM

How can I achieve this.

Answer 1

Maybe something like this:

DECLARE @Today DATETIME
SET @Today=GETDATE()

SELECT DATEADD(DAY,-DAY(DATEADD(MONTH,MONTH(@Today)+1,@Today)),
DATEADD(MONTH,1,@Today))

You could also do it like this:

SELECT @Today+datediff(day, @Today, dateadd(month, 1, @Today))-
DATEPART(day,@Today)

Like @Aaron Bertrand said:

I’d be careful about using implicit date math (@Today+…) because
this syntax will fail on newer data types (the OP may eventually move
off SQL Server 2005 and be enticed by DATE or DATETIME2, or other
readers may already be using DATE etc.)

So according to that then something like this:

SELECT DATEADD(DD,datediff(day, @Today, dateadd(month, 1, @Today))-
DATEPART(day,@Today),@Today)