SQL to change the negative number to positive number

My apologies for the no doubt high 'thick-as-a-Board' nature of my request.

Is it possible to convert a negative number by a positive value using SQL. I have a report that joins the 2 tables and I want to join the tables on a field 'amount '. Problem, is that in the 1 table QTYs are negative, and in another QTYs are positive. I know that this is in itself is a stupid thing to do, but anyway.

I was just wondering if there is a simple way to get positive number versions of numbers:
GET sampledata
WITH sampledata AS
     (SELECT -345 var_num
        FROM DUAL
      UNION ALL
      SELECT -423423
        FROM DUAL
      UNION ALL
      SELECT -323.5
        FROM DUAL)
SELECT *
  FROM sampledata;
Any advice much appreciated.

Thank you

Published by: jimr on February 9, 2010 12:38
Change of subject

you mean this:

SQL> ed
Wrote file afiedt.buf

  1  WITH sampledata AS
  2       (SELECT -345 var_num
  3          FROM DUAL
  4        UNION ALL
  5        SELECT -423423
  6          FROM DUAL
  7        UNION ALL
  8        SELECT -323.5
  9          FROM DUAL)
 10  SELECT var_num
 11       , abs (var_num)
 12*   FROM sampledata
SQL> /

   VAR_NUM ABS(VAR_NUM)
---------- ------------
      -345          345
   -423423       423423
    -323.5        323.5

Tags: Database

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