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SELECT subset optimization
Message
De
19/02/1997 06:39:52
 
 
À
18/02/1997 16:19:16
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00020942
Message ID:
00021024
Vues:
45
>>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.

Did you know that there are innocent people dying in East Timor?
It helps if you do...

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