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sdc248
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view or stored procedure

Hi:

I need to make sure the data rows selected in a query are unique. The database table is huge. I did a test by running the following query and it takes 10-20 seconds to complete.

SELECT COUNT(*) FROM (SELECT DISTINCT * FROM dbo.MyTable ) AS a

I wonder which appraoch would have better performance:
1. simply put the above statement in my stored procedure.
2. create a view that does SELECT DISTINCT * FROM dbo.MyTable, and then select data rows from the created view from my stored procedure.

Please comment. Thanks.
Microsoft SQL Server

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sdc248

8/22/2022 - Mon
Anthony Perkins

Explicitly naming the columns should perform better.
SOLUTION
alpmoon

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sdc248

ASKER
Got it. Thanks guys.
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