SQL Server 2008 R2: User table with clustered indexes

435995 pts.
Tags:
Clustered Index
SQL Server 2008 R2
SQL Server tables
I recently found that a couple of my tables in SQL Server 2008 R2 with no clustered indexes defined. However, there are non-clustered indexes defined (so basically they're on HEAP). After I did some searching, I learned that some select statements were using a filter on the columns defined (in non-clustered indexes). My question is not having a clustered index on these tables affect their performance?

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Thanks. We'll let you know when a new response is added.

If the query is using a seek on the nonclusteredindex without any problems, then having thetable as a heap will not cause any problems. Having a clustered index is typically recommended, but is not required.

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