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Base de données, Tables, Vues, Index et syntaxe SQL
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Windows 2000 Server
yeah, I figured it was the TOP N part of the sub-query that was the issue. The odd thing is that I think this type of query is possible in Access.
>>I need to retrieve the top 2 most current rows (using date) for each group (A, B, C). I have created some sample data and the expected results. Anyone got a solution?
>>
>>SELECT group, date ;
>> FROM temp t1 ;
>> WHERE pk IN ;
>> (SELECT TOP 2 pk FROM temp t2 ;
>> WHERE t2.group = t1.group ;
>> ORDER BY date desc)
>>*-- Get Queries of this type are not supported
>>*-- should get back
>>group date
>>A 05/01/2005
>>A 06/01/2005
>>B 02/01/2005
>>B 03/01/2005
>>C 05/01/2005
>>C 06/01/2005
>>
>
>The problem is that you can't use TOP n in a correlated subquery. I'll keep pondering on this and see if I can come up with a solution.
>
>Tamar
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