Display record older than 3 months in sql

Question

I need to create a SSIS package that will go through the records in one table(T1) older than 3 months (based on ALERT_TIMESTAMP) a

Answer 1

What you posted is not MySQL. Assuming you are using MS SQL Server, you should use the ABS() function.

SELECT   * FROM        T1
WHERE     ABS(DATEDIFF([month], ALERT_TIMESTAMP, GETDATE())) > 3