A simple query to write for the SUM of a column
HelloI have a Quantity column. I want his total.
For a PURCHASE, I would like to add the value in the column Qunatity.
For a COPY, I want to subtract the value in the column Qunatity.
So overall, the sum of the column should give me total buy less total sells.
Any help is welcome.
Thank you.
Published by: TechVortex on August 11, 2011 11:49
Like this?
SQL> ed
Wrote file afiedt.buf
1 with sample_data as
2 (
3 select 100 quantity, 'B' flag from dual union all
4 select 200, 'B' from dual union all
5 select 100, 'S' from dual union all
6 select 500, 'B' from dual union all
7 select 200, 'S' from dual
8 )
9 SELECT SUM(quantity),
10 SUM(DECODE(flag, 'B', quantity,
11 'S', -quantity)) absolute_sum
12* FROM sample_data
SQL> /
SUM(QUANTITY) ABSOLUTE_SUM
------------- ------------
1100 500
Tags: Database
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