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Very Poor Performance of SQL on Local Table
Message
 
 
À
12/02/2002 11:34:58
Jay Johengen
Altamahaw-Ossipee, Caroline du Nord, États-Unis
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00618884
Message ID:
00618988
Vues:
21
>I have a view of a database that is taking almost 2 minutes to complete. I copied the SQL, modified it, and am using the resulting statement below to test with.
>
>I am only selecting 93,794 out of 141,642 records on a table (belongs to a database) on a local drive. It still is taking between 30 seconds and 1 minute to complete. There are already various indexes on the base table and one specifically for FileType. I have reindexed everything, validated the database and done everything I know to do. Why would this take so long to run? Thanks!
>
>
>SELECT * FROM data\Employee.dbf WHERE Employee.filetype = "EMPLOYEE"
>
>

Renoir,
Remove the alias from the WHERE clause. I have seen this slow queries down. Also, what does SYS(3054) report for optimization levels?
Larry Miller
MCSD
LWMiller3@verizon.net

Accumulate learning by study, understand what you learn by questioning. -- Mingjiao
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