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Select TOP 1 on two fields
Message
De
25/02/2023 06:15:56
Metin Emre
Ozcom Bilgisayar Ltd.
Istanbul, Turquie
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
01686062
Message ID:
01686267
Vues:
58
>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?
>
>TIA
>
>UPDATE. I think the problem I have is defining the ORDER BY clause correctly. What am I missing?

Hi Dmitry,

This will be make two order by with two fields as independent:
select TOP 1 CONVERT(VARCHAR(10),DATE_FLD,101) + STR(ORDER_NO), FIELD2, FIELD3 from MyTable order by DATE_FLD, ORDER_NO DESC

Try this one:
select TOP 1 CONVERT(VARCHAR(10),DATE_FLD,101) + STR(ORDER_NO), FIELD2, FIELD3 from MyTable order by 1 DESC
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