Hi , I knew I was not explaining better.
> sno | id | amount > > 1 | 1 | 200 > > 2 | 1 | 300 > > 3 | 2 | 100 > > 4 | 2 | 100 > > 5 | 1 | 500 > > > > how could I subtract the sno 1 id 1 and sno 2 id 1 amount . > > select > (select amount from tableName where sno=1 and id=1) - > (select amount from tableName where sno=2 and id=1); > > What if I do not have control over sno i.e it is random or unpredictable , I want to subtract it in order of occurrence. Like doing subtracion of sno 2 and 5 and so on may be next occurance for id 1 is at sno 20 , then what. -- Regards, Vishal Kashyap. Need help visit http://help.vishal.net.in
