Comparison of characters as dates

Question

HI all,
10.2.0
I have a table tbl as
code, amt1,amt2,yearmon
1 10 10 2007MAR
1 20 10 2007FEB
2 10 30 2007FEB
3 10 20 2008FEB
That is the amt1 and amt2 are amounts for every month belonging to different years.
BUt if i want to get the amt1 and amt2 upto a range then since yearon is character,it is not doing the comparison.
select code,sum(amt1+amt2) from tbl where yearmon between '2007APR' and 2008FEB' group by code;
then it is not giving the desired result because yearmon is a charcter.
How can i calculate sum upto a given range in this case.
Regards

Answer 1

I believe this is what, you need
create table tbl as (
select 1 code, 10 amt1, 10 amt2, '2007MAR' yearmon from dual union all
select 1, 20, 10 , '2007FEB' from dual union all
select 2 , 10 , 30 , '2007FEB' from dual union all
select 3 , 10 , 20 , '2008FEB' from dual )
SQL> select code , sum(amt1+amt2) from tbl
where to_date(yearmon, 'YYYYMON') between to_date('2007APR', 'YYYYMON') and to_date('2008FEB' , 'YYYYMON')
group by code;
2 3
CODE SUM(AMT1+AMT2)
3 30Regards,
Ritesh
Edited by: Ritesh S Kumar on Jan 1, 2009 4:42 AM