mickyT (6/26/2014)
I'd vote for Lynn's personally. His will return all the rows for Markers that have multiple rows all have Val 'Y'. This would become important if there are other columns to be returned.For example
'A','Y',0.01
'A','Y',1.24
'B','Y',1.4
'B','N',5.47
This would be a change in the requirements. For this type of thing I would agree but that is not at all what was originally posted.
The upside is that we have come up with a number of ways to accomplish this. They all have merit and will work in certain situations. There is no "best" way for much of anything in sql server across the board. Everything must be evaluated with reference to the task at hand.
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