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SELECT subset optimization
Message
From
19/02/1997 06:39:52
 
 
To
18/02/1997 16:19:16
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
00020942
Message ID:
00021024
Views:
41
>>select MEMBER.PRENOM, MEMBER.NOM
>>From MEMBER Inner Join LISTSERV
>>On MEMBER.NUMERO = LISTSERV.NOMEMBER
>>Where LISTSERV.NOCLIENT = 5
>
>Ok, this is faster.
>
>Now, is the Inner Join faster than the following SQL?
>
>SELECT MEMBER.PRENOM,MEMBER.NOM FROM MEMBER,LISTSERV;
> WHERE LISTSERV.NOCLIENT=5 AND LISTSERV.NOMEMBER=MEMBER.NUMERO

Never tested it with "Blood and Sweat" but supposedly yes, because joinning is not the same as filtering a set of records. Anyway, Joins are the ANSI implementation of the SQL.
Alexandre Nobre
Alpha Bytes Computer Corp.

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