What is Function?
How to Execute Function (SELECT | Variable | dbms_output)
Function With BOOLEAN Return Type

Difference Between PROCEDURE and Function.
is it Possible to Return More than one value in Function
	OUT | Collection | Ref-Cursor
What will happen if we have more than one RETURN statement.

is it possile to Write DML statement inside the Function / Call Procedure 
	PRAGMA autonomous_transaction;