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Can this be done in one SQL Select?
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À
08/02/2005 19:47:04
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00984864
Message ID:
00984992
Vues:
27
>>I need help in selecting records from the following table (simplified):
>>
>>CUST_ID
>>ORD_DATE
>>ORD_TIME
>>
>>For a given date (ORD_DATE), I need to select one order record per customer (CUST_ID) based on the time of order (ORD_TIME). For example, the Order Time should be the latest of the day.
>>
>>I would appreciate any suggestions.
>>
>>Thank you.
>
>
>dGivenDate=DATE()
>SELECT * INTO CURSOR Results;
>  FROM theTable T ;
>  WHERE ORD_DATE=m.dGivenDate;
>    AND T.ORD_TIME =(SELECT MAX(ORD_TIME) FROM theTable WHERE ORD_DATE=T.ORD_DATE AND CUST_ID=T.CUST_ID)
>
Fabio,

Thank you very much for the suggestion. I will try it tomorrow. Right now I am working on the approach with a query with UDF.
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
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