Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Always trips me up!
Message
 
 
À
14/06/2007 16:35:47
Mike Yearwood
Toronto, Ontario, Canada
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 9 SP1
OS:
Windows XP SP2
Database:
Visual FoxPro
Divers
Thread ID:
01233129
Message ID:
01233301
Vues:
17
>>>>Just compare the speed. I am very curious which way is better. Never had enough records to make a proper tests.
>>>
>>>Just FYI
>>>
>>>Using live data (local hard drive - not on the server), running both queries 1,000 times resulted in 57.307 seconds for yours and 74.672 for Sergey's.
>>
>>Mike, what about my as well?
>>
>>How many tests did you run?
>
>Which was your query? This one seems like it won't work because sh.statusID cannot match CTOBIN(RIGHT(MAX(DTOS(ChangeDate)+BINTOC(StatusId )),4)?
>
>SELECT Mb.*, Sh.* ;
> FROM Members mb ;
> INNER JOIN StatusHistory sh ON Mb.MemberId = sh.MemberId ;
> WHERE sh.StatusId IN ;
> (SELECT CTOBIN(RIGHT(MAX(DTOS(ChangeDate)+BINTOC(StatusId )),4)) ;
> FROM StatusHistory GROUP BY MemberId )

Yes, this one. Try it. I'm working on something, read the tek-tips thread for an explanation why it works.
If it's not broken, fix it until it is.


My Blog
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform