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Indexing and Joins
Message
De
07/08/2001 08:44:16
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00540551
Message ID:
00540604
Vues:
19
>>Hi
>>
>>This is an indexing question.
>>
>>I have 2 tables with the following statement:
>>
SELECT * FROM Table1;
>>  LEFT OUTER JOIN Table2;
>>    ON Table1.Field1 = Table2.Field1;
>> etc. etc.
>>
>>Right, Table2.Field1 is indexed, but Table1.Field1 is not, will it make a difference in performance if Table1.Field1 was indexed?
>
>Yes. See Sys(3054) in VFP help to see how to determine the level of optimization.

Mark

SYS(3054) reports the same whether Field1 is indexed or not!

Kev
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