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Select and group by excluding one field

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# 1  
Old 08-16-2012
Select and group by excluding one field
Dear community, I have a very simple query (on Oracle 11g) to select 3 fields:
Code:
select field1, field2, field3, count(*) from table
where...
group by field1, field2, field3
having count(*) > 10;

Now, what I need, is exclude "field3" from the "group by" since I only need field 1 and 2 to be grouped, but I also need field3 in the output.
As far I know, all the fields in the select must be reported also in "group by", so how can I handle that?

Thanks
Lucas
# 2  
Old 08-16-2012
You have to use "sub-selects", which go kinda like this:
Code:
select f.a, f.b, f.c, g.x
from
  (  select field1 a,
              field2 b,
              count(*) c
     from mytable
     group by field1, field2) f,
  (select distinct field3 x
     from mytable
    where field1=f.a 
       and field2=f.c) g;

But I suspect that you may have a schema design problem instead.
# 3  
Old 08-16-2012
Quote:
Originally Posted by jim mcnamara
You have to use "sub-selects", which go kinda like this:
I used the query you provide me, just changed the fields name according with my table, but I got:
Code:
ORA-00904: "F"."C": invalid identifier
00904. 00000 -  "%s: invalid identifier"
*Cause:

Smilie
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