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AndyYehoo
 Post subject: How to implement such difficult sub query?
PostPosted: Mon Jul 11, 2005 9:27 pm 
Newbie

Joined: Sun Aug 01, 2004 11:50 pm
Posts: 4
select aa.*
from document aa
,(select category, max(uploadTime) as uploadTime
from document
group by categroy) bb
where aa.category=bb.category and aa.uploadTime=bb.uploadTime


I have try some method but it doesn't work. Pls give me some hints. Thanks.
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jweiskotten
 Post subject:
PostPosted: Mon Jul 11, 2005 9:50 pm 
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Beginner

Joined: Fri Jul 08, 2005 12:38 pm
Posts: 41
Location: Massachusetts, USA
What you have won't work, but I'm not quite sure what you're trying to get.
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AndyYehoo
 Post subject:
PostPosted: Mon Jul 11, 2005 10:03 pm 
Newbie

Joined: Sun Aug 01, 2004 11:50 pm
Posts: 4
that's a trandictional SQL which can run well in pqsql.

how to turn it to a HSQL?
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