Deleting (Performance issue)

Hi

i had 3 fields in my itab

status

and pr qunty and po qunty this is selected from eban table statu, menge and bsmng

i want to delete only those fields whose status = b and menge = bsmng

DELETE i_preq WHERE statu = 'B'

AND menge = i_preq-bsmng.

• Imp - all this 3 fields are in one itab

this is not working

i think i have to delete in loop but then its comes performace issue if i have to delete in a loop then pls give me an example how can i and for performance tips too.

regards

points will be rewarded for answers