Select Rows based on Where Condition but group them based on a specific Column value

Question

I want to Select some rows from the database based on my where clause and group them based on some condions.

I have done this till now

SELECT col1, Encounter.EncounterId, col2, col3 FROM Abcd
Where SomeCondition
GroupBy Encounter.EncounterId

Returns an error is:

not contained in an aggregate function or the group by clause.

Answer 1

Try this :

 SELECT col1, Encounter.EncounterId, col2, col3 FROM Abcd
 Where SomeCondition
 GroupBy col1, Encounter.EncounterId, col2, col3