Between older than 30 days and less than 90days

Question

I need to return records where there is a date older than 30days but less than 90days. so If someone bought something either 31 days ago or 89 days ago its those rows i need to return, ignoring the last 30 days and anything outside of 90days.

Answer 1

WHERE DateCol < DATEADD(dd, DATEDIFF(dd, 0, DATEADD(dd,-30, GetDate())), 0)
AND   DateCol > DATEADD(dd, DATEDIFF(dd, 0, DATEADD(dd,-90, GetDate())), 0)

The DATEADD-DATEDIFF truncates the time part, so that 30 days ago means midnight 30 days ago.

Demo