Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
How to combine two flds in one with on SQL Select?
Message
 
 
À
05/09/2005 18:25:29
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:
01046819
Message ID:
01046868
Vues:
15
>>>
>>>Yes
>>>
>>>
>>>SELECT ROOM1 ROOM,RES_DATE,RES_TIME;
>>> FROM Table WHERE condition1;
>>>UNION; && this is a distinct union ( like a UNION NEWS
>>>SELECT ROOM2,RES_DATE,RES_TIME;
>>>FROM Table WHERE condition2;
>>>
>>
>>I am sorry for troubling you again. But I have one more question, please. You showed me how to have two WHERE, one for each SELECT, top and bottom. What if I wanted to have one WHERE that would apply to the resulting cursor, the one created with UNION?
>
>You can in VFP9
>
>SELECT * FROM ;
>(SELECT * FROM AA WHERE condition1;
>UNION ALL;
>SELECT * FROM AA WHERE condition2) SUBQUERY;
>WHERE condition3
>
>but you should watch out,
>because in this case condition3 cannot use an index
>(and to be optimized)

Thank you for your explanation, Fabio.
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
"My experience is that as soon as people are old enough to know better, they don't know anything at all." Oscar Wilde
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." W.Somerset Maugham
Précédent
Répondre
Fil
Voir

Click here to load this message in the networking platform