Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Select TOP 1 on two fields
Message
De
01/02/2023 14:47:52
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
01686062
Message ID:
01686064
Vues:
49
>Hi,
>
>I am creating a SQL Select that will select ONE record based on two fields. The two fields are DATE_FLD and ORDER_NO field. There could be more than one records with the same DATE_FLD value (e.g. "01/01/2023) but the ORDER_NO will be different for each record. I need to select a record with the largest value in the ORDER_NO field.
>
>Here is my test:
>
>select TOP 1 CONVERT(VARCHAR(10),DATE_FLD,101) + STR(ORDER_NO), FIELD2, FIELD3 from MyTable order by DATE_FLD, ORDER_NO DESC
>
>
>Will the above give me what I am looking for?
>

That's overkill. Use:
SELECT DATE_FLD, MAX(ORDER_NO) FROM MyTable GROUP BY DATE_FLD 
Tamar
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform