Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Primary Key
Message
 
À
06/06/2003 03:03:34
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
Divers
Thread ID:
00797053
Message ID:
00797081
Vues:
16
I am mainly an Oracle guy. So it was tough for me to digest.

Aashish

>>Hi,
>>
>>Primary key accepts empty values. Should Primark Key behave like this ?
>>Am I wrong somewhere ?
>
>If a primary key is accepting an empty value it's normal. It ensures value would be unique but doesn't guarantee it wouldn't be empty. ie: For an integer PK 0 is a perfectly legal value.
>But if a primary key is accepting empty values then you've a problem. Keys might not be updating at all.
>Not empty is something you should control as well as not null.
>Cetin
--
--
Aashish Sharma
Tele Nos: +1-201-490-5405
Mobile: +91-9821053938
E-Mail:
aashish@aashishsharma.com
write2aashish@gmail.com

You better believe in yourself... if you don't, who else will ?
TODAY is a gift, that's why it's called PRESENT
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform