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Re: GROUP BY disables indexes and parallel query

From: Robert Miller <rwmiller_at_gte.net>
Date: 1997/04/16
Message-ID: <5j2pev$ls3$1@news7.gte.net>#1/1 







In the select clause, the second example has count(*).  This does a
full table scan.  No index is available or specified.  Try
count(col_id), where col_id is an indexed column.  

-- 


Robt



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^~~~~....

Robert Miller         
Oracle DBA  

robt.miller_at_airmail.net
(214) 532.6558



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^~~~~....

Any opinions expressed are my own and do not necessarily
represent any employer.


Received on Wed Apr 16 1997 - 00:00:00 CDT












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