Re: sql query problem

Heather,

This is one possible solution:

select c1,c2,c3
from vgt a
where c1||c3 in

              (select max(b.c1||b.c3)
                 from vgt b 
                where b.c2 = a.c2)

Table vgt values are:

select * from vgt
  2 /  

C C C
- - -
1 a 1
1 b 1
1 b 2

SQL> desc vgt

 Name                            Null?    Type
 ------------------------------- -------- ----
 C1                                       VARCHAR2(1)
 C2                                       VARCHAR2(1)
 C3                                       VARCHAR2(1)

Hope this helps,

Vikram Goel
Sr. DBA ( Consultant)
Aerotek Inc, Florida
e-mail: vgoel_at_emi.net

In article <4dog2a$cqh_at_template.com>, Heather Dyson <heather.dyson_at_template.com> writes:
>I have a table that has a primary key of
>number, code, month
>
>Let's say that I have the following data
>
>number code month
>------ ---- -----
>1 a 1
>1 b 1
>1 b 2
>
>I want to formulat a query so that I get only the rows with the greatest
>month values for number and code. So the result of my query for the
>example would be
>
>number code month
>------ ---- -----
>1 a 1
>1 b 2
>
>I know this is probably easy, but I would appreciate any help.
>Thanks,
>Heather
>
Received on Fri Jan 19 1996 - 00:00:00 CET