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Help to build a query with inners, left, right or full j
Message
De
16/06/2004 11:08:47
 
 
À
16/06/2004 09:57:43
Hilmar Zonneveld
Independent Consultant
Cochabamba, Bolivie
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00913984
Message ID:
00914274
Vues:
7

ORDER BY not necessary? Perhaps you are right, but I am not sure. I may be wrong, but I think I read somewhere that there is no guarantee that the records will appear in any specific order. In other words, it might work in some cases, and not in others.


On VFP9 perhaps, the order can not will be guarantee (but I think not).

The reason? Simple, VFP does not optimize GROUP BY and ORDER BY,
and therefore it executes GROUP BY with a simple algorithm
(in truth not much efficient < 50%),
and this necessarily orders the columns in ASCENDING ORDER.

I think that nobody can find against example.

Fabio
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