Posted by Erland Sommarskog on 04/02/06 13:45

wgblackmon@yahoo.com (wgblackmon@yahoo.com) writes:
> I'm running the following SQL to get values for 4 fields. It is
> unacceptably slow. I have no control over the structure of the
> database, field names, indexes etc. - what I'm given as far as DB
> design is all I'm going to get. If anyone could make any suggestions
> I'd really appreciate it!

My newsserver had an outage, so the reply I posted originally got lost.
What I said in that post was not that fantastic:

Without know the tables and indexes it's about impossible to give
suggestions. If you post the CREATE TABLE and CREATE INDEX statements
(don't forget constraints!), as well some indication of table sizes,
we might be able to give some tips.

Even better if you can run:

SET STATISTICS PROFILE ON
go
-- query goes here
go
SET STATISTICS PROFILE OFF
go

and post the output. (Preferably in an attachment, as the output is far too
wide for news article).

However, a few minutes later one more thing occurred to me, and that was
when I discovered that the newsserver was sick.

Anyway, what you could try is to run DBCC DBREINDEX on all involved tables.
While it is not going to cause the query to run with the speed of light
all of a sudden, you could see an improvement with 20-30% if there is
serious fragmentation of the tables.

--
Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinfo/previousversions/books.mspx

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