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Time, not just date, is part of PK--should I create a time dimension?

Posted By:      Posted Date: November 20, 2010    Points: 0   Category :Sql Server
 

Hello,

Should I create a time dimension if the time is part of the primary key?  I'm trying to create a fact table of successful user connections.  Since each user can connect their device more than once per day, I don't have a complete primary key.  What's the correct way to handle this?

I just thought of something: should I be using storing an aggregate by date key instead, so that each line has a "ConnectionCount" column but not a "ConnectionDate" column?

Thanks for your help,
Eric

 

CREATE

 

TABLE MyFact (
UserKey


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