Hi,
    I want to find difference between two rows of a table and insert  the difference value as third row in the same table. If the first row  value is less than second row then the difference should appear within  parenthesis instead of negative symbol.
  Ex:
 Name        Service1   Service2    Service3  Service4
 xxx             98             70               50            85
 yyy            50            90                35            105
 Diff            48            (20)             15             (20)