Use Partition in SQL

Question

I have a problem with a query. Here is the query.

SELECT UserID, MAX(UserName) as UserName, MAX(TransactionTime) as TransactionTime,         MAX(LastAction) as L         


        

Answer 1

A ranking function is probably what you are looking for:

SELECT *
FROM (
   SELECT UserID, UserName, LastAction, row_number() over(partition by UserId order by TransactionTime desc) RowNo
   FROM UserActivities 
   WHERE OrganizationID = 26465
) t
where t.RowNo = 1