SQL Server date comparisons based on month and year only

Question

I am having trouble determining the best way to compare dates in SQL based on month and year only.

We do calculations based on dates and since billing occurs on a monthl

Answer 1

You can use formatting your date like this 'yyyyMM' , so only the month in the same year will be selected.

SELECT * 
FROM tableName 
WHERE FORMAT(date_month_bill, 'yyyyMM') < FORMAT(DATEADD(MONTH, -1, GETDATE()), 'yyyyMM') 
AND FORMAT(date_month_bill, 'yyyyMM') > FORMAT(DATEADD(MONTH, -3, GETDATE()), 'yyyyMM')