I am having a Table with timestamps (TS) and categories (UserID) and want to create an additional column (EventID) with an ID that is runs from 1 to n(UserID) individually for each category:
TS UserID EventID <- to be calculated
01:12 00001 001
01:14 00001 002
01:15 00001 003
01:11 00002 001
01:14 00002 002
01:16 00002 003
My current attempt looks like this, but the calculation doesn't run through and the program stops responding:
[TS] <= earlier([TS])
I have something of about 330k rows, but I'd like it to be able to handle more than that.
In case it's not obvious, I'm rather new at this and google most of my code. Thanks a lot in advance for your help!