🚀 go-pugleaf

I have two similar tables, one seated on SQL Server, and the other in
Interbase.
The lines of code that follow works perfectly well in SQL Server.

--------------
select max(High) AS HIGH, min(Low) AS LOW, max(TotalVolume) as HiVol,
min(TotalVolume)LowVol
from TB_Daily
where IssueID = 123 and year(TradedDte) = 1999
group by month(TradedDte)
--------------

I made an equivalent SQL statement in Interbase as follows:

--------------
select max(High) AS HIGH, min(Low) AS LOW, max(TotalVolume) as HiVol,
min(TotalVolume)LowVol
from TB_Daily
where IssueID = 123 and extract(year from TradedDte) = 1999
group by extract(month from TradedDte)
-------------

My problem is, I get an error in the Group By portion. What should I do
inorder to get the same results as delivered
through my SQL statement used in SQL Server, where it performs the aggregate
functions grouped by months???

Please help!!!

JEchavez