:: Is the table growing and growing and you still want to group
:: by month, not depending on what year it is?

Actually yes year would be part of it.

:: SELECT
:: EXTRACT(MONTH FROM FieldTimeStamp),

This was exactly my plan and how Im doing it now. But will Extract use an
index? Also I might need to group by year and month in some cases where the
criteria might extend beyond 12 months.