Avoiding duplicates in the query

Question

Hi..
I've written the following query to meet the requirement.. but getting the duplicates
SELECT   a.rpper, a.idate, a.icycle, b.rpper,
         b.idate, b.icycle
    FROM i_sum a, i_sum b
   WHERE a.rc = b.py
     AND a.py = b.rc
     AND a.prd = b.prd
     AND a.svc = b.svc
     AND a.itype = 'bieral'
     AND b.itype = 'bieral'
     AND a.dir = '-'
     AND b.dir = '-'
     AND (   (a.idate != b.idate)
          OR (a.icycle != b.iycle)
ORDER BY a.rpper, b.rpperThe output i'm getting like
A-G-11/9-SMS    30-Nov-09    112   G-A-11/9-SMS   31-Aug-09    113  
G-A-11/9-SMS   31-Aug-09    113    A-G-11/9-SMS    30-Nov-09   112
-----In the above output the 2nd row is duplicate for my output..
how can i avoid such data
Thanks..

Answer 1

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I have the following table called sales
with sales
as
      select 1 sales_id, 1 prod_id, 1001 inv_num, 120 qty from dual
      union all
      select 2 sales_id, 1 prod_id, 1002 inv_num, 25 qty from dual
select *
  from sales 4. Rather than telling what you want in words its more easier when you give your expected output.
For example in the above sales table, I want to know the total quantity and number of invoice for each product.
The output should look like this
Prod_id   sum_qty   count_inv
1         145       2 5. When ever you get an error message post the entire error message. With the Error Number, The message and the Line number.
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