In Procedure and Triggers

[kareem2003]

Dear members of erp,
In procedure tell me the following commands
CALL OSQL ?
CALL OBNDRV ?
CALL OEXEC ?
where we r useing commands

Triggers
we can use the COMMIT,ROOL BACK,SAVE POINT in Triggers or NOT ?
IF NO why?

How can we display the sum(sal) with department wise in SINGLE LINE ?