How do you test if something is older than 3 months?

Question

I have been having some trouble to select the rows of my table which has a date of 3 months prior of today. I tried using DATE(NOW() - INTERVAL 3 MONTH) in my where

Answer 1

The DATEDIFF function should be helpful to you:

http://msdn.microsoft.com/en-us/library/ms189794.aspx

UPDATE[TCTdb].[dbo].[Stock]
    SET[Warehouse] = 'old'
    WHERE DATEDIFF(month, [ManufacturedDate], GETDATE()) > 3