Triggers-Mutating Table

Originally Posted by mask

I am writing a trigger for delete event of employee table (PK - empno, Mrgid - Self referencing key ) in oracle .In the trigger , i wish to update the rows of the same table which have mgr id equal to the empno being deleted, and set the mgrid=null. The problem coming here is of Mutating table.Is there a simple workaround of this problem?
Thx n regards