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DISTINCT changes datatype
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À
11/05/2010 20:29:58
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 8 SP1
Divers
Thread ID:
01464251
Message ID:
01464254
Vues:
47
>Working with a MySql backend.........
>
>
=SQLEXEC(lnHandle, "SELECT myBitField FROM mySqlTable","myCursor)
>The results are logicals, as I expected.
>
>
=SQLEXEC(lnHandle,"SELECT DISTINCT myBifField FROM mySqlTable","myCursor")
>and the results are character
>
>Does anybody have an explanation for this? Even better, is there a simple way to get it back to the "correct" data type?
>
>Thanks to all........Rich

What is the point of such strange select statement? The only possible values you can get are 1/0 or NULL. Are you checking if you have all 3 of them?

In other words, why do you need to go to MySQL at all to get this result?
If it's not broken, fix it until it is.


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