Im not sure if this the right forum but:
I have a data output with many rows. In order to group things with flags, I do this in excel using 2 formulas which *** a flag of 0 or 1 in 2 new columns.
This takes a long long time as I have hundreds of thousands of rows and wondered of I could do it in sql?
Its transact SQL and the formulas I use in excel are:
=IF(SUMPRODUCT(($A$2:$A2=A2)*($B$2:$B2=B2)*($C$2:$C2>=C2-1/24)*($C$2:$C2< C2+1/24))> 1,0,1)
Any idea how I can do this in sql??
The columns above do not relate to the actual columns I use, just an example.