A procedure is a named program unit. It consists of three parts:

► Declaration Part - Defining the procedure name, calling parameters, local variables and local procedures. Declaration part is required.

► Execution Part - Defining execution logic with executable statements. Execution part is required.

► Exception Part - Defining error handling logics. Exception part is optional.

Here how a complete procedure should look like:

PROCEDURE name (parameter_1, parameter_2) AS

-- Declaration statements

BEGIN

-- Executable statements

EXCEPTION

-- Error handling statements

END;