Answer Posted / sudipta santra

PRE-QUERY: BEFORE PARSING OF QUERY THIS TRIGGER IS FIRED.

POST-QUERY: AFTER PARSING OF THE QUERY AND BEFORE POST TO
THE DB, IT IS FIRED.

NOTE: THE VALUE CAN BE CHANGED AFTER FIRING PRE-QUERY BUT
THE VALUE CAN NOT BE CHANGED AFTER FIRING POST-QUERY.

PRE-INSERT: BEFORE INSERT IN THE DATA-BLOCK, IT IS FIRED.

POST-INSERT: AFTER INSERT INTO THE DATA BLOCK AND BEFORE
POST INTO THE DB IT IS FIRED.

NOTE: THE VALUE CAN BE CHANGED IN PRE-INSERT BUT NOT
POSSIBLE IN POST-INSERT.

in user parameter property we have list of values.can we write select query for binding? for example:: select empno from emp where deptno=:deptnum :deptnum is first parameter it displays distinct dept nos. if i do like this it is giving error:: bind variables are not allowed in the select statement

2227