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Posted by M A Srinivas on 07/23/07 06:35
On Jul 22, 9:19 am, deluca.vice...@gmail.com wrote:
> Hi,
>
> I'm trying to build a query that get only one row from a group of
> rows, but I need the values from that row and not the results of one
> function group.
> I need one row for each idRef, with column2=2 and the bigger column1
>
> id |idRef | column1 | column2
> 1 1 0 1
> 2 1 1 2
> 3 1 2 1
> 4 2 0 1
> 5 2 1 2
> 6 2 2 1
> 7 2 3 2
>
> For these, I will take the rows with id=2 and id=7.
>
> Thank you, and sory for my english.
select a.* from tbl a
join
(select idref,max(column1) as column1
from tbl
where column2 = 2
group by idref) as b
on a.idref = b.idref
and a.column1 = b.column1
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