can this simple SQL query be optimized?

Posted by ibiza on Stack Overflow See other posts from Stack Overflow or by ibiza
Published on 2010-05-12T13:15:18Z Indexed on 2010/05/12 13:24 UTC
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sql

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sql-server

Hi,

I have the following query :

SELECT COUNT(*) FROM Address adr INNER JOIN Auditable a on adr.UniqueId = a.UniqueId

on a big DB (1.3M adresses, 4M+ auditables)
both UniqueId columns are clustered primary keys

the query is taking quite long to complete...I feel dumb, but is there any way to optimize it? I want to count all the address entries that have an underlying auditable...

thanks!

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