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SQL select to sum from two tables?
Message
 
 
À
04/06/2009 17:43:13
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
01403521
Message ID:
01403831
Vues:
31
>>I think the second should be faster, so I would be surprised if you got different results in your tests.
>
>What's a good way to test so as to eliminate the effects of cached data and stuff? The data is on free tables on a server on our lan, and I am runnnig the app on my desktop, so the data is coming over the LAN.
>
>I want to be sure I do not mess up the results by having it the data cached or something.

I'm not exactly sure.

I would probably try in a loop of, say, 5 the first way and get the time (longest - would be the first run, then min and average). Then close VFP, walk out from the computer for 10 minutes, come back and re-run the second.
If it's not broken, fix it until it is.


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