Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Index on integer & date fields
Message
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00229164
Message ID:
00229180
Vues:
20
>>>Can I create an index based on an integer & a date field? Actually, the integer refers to the primary key (unintelligent) of another table.
>>>
>>>Thanks.
>>
>>Yes, use STR(IntegerField) + DTOS(DateField) as the key for the index
>
>Actually, I have 3 tables. Table 1 parent of table 2 & table 2 parent of table 3. I want to create an index in table 3 that is on the primary key of table 1 plus a date field. Can the table 3 index expression be
>STR(table2.integerField) + DTOS(table3.DateField)

Jane, assuming that you have the table2.integerField in Table3 as a foreign key, your index would be str(tagle3.integerfield+dtos(table3.DateField). If you DON'T have the table2.integerField in Table3, how are you planning to link the child records in Table3 with their parents in Table2?

Barbara
Barbara Paltiel, Paltiel Inc.
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform