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What are the consequences of putting a NON CLUSTERED index on a PK column?

Posted on 2009-12-18
Medium Priority
Last Modified: 2012-05-08
I have a table that gets HUGE (250 MILLION records), the only thing that happens to this table is INSERT and SELECT.

Some of the searches by date appear to be slow, so we tossed around the idea of putting a NON CLUSTERED index on the data column. The date column is part of a composite key. RID+INSDATE is the primary key, so I know the insert date is already indexed.

Any suggestions why I should or should not?

Question by:sqlagent007
1 Comment
LVL 26

Accepted Solution

tigin44 earned 2000 total points
ID: 26084421
RID+INSDATE composite primary key should be clustered indexed..  You may define a non clustered index on INSDATE column too.. Thet will increase the performance of the queries that are based  column in a huge table like yours...t

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