Basic Oracle Concepts and Programming Question:

To define cursor variable, you must decide which REF CURSOR data type to use. There are 3 ways to select a REF CURSOR data type:

► Define your own specific REF CURSOR types using the TYPE ... RETURN statement.
► Define your own generic REF CURSOR type using the TYPE ... statement.
► Use the system defined REF CURSOR type: SYS_REFCURSOR.

The follwoing tutorial exercise defines 3 cursor variables in 3 different ways:

CREATE OR REPLACE PROCEDURE ggl_CENTER AS
TYPE emp_ref IS REF CURSOR RETURN employees%ROWTYPE;
TYPE any_ref IS REF CURSOR;
emp_cur emp_ref;
any_cur any_ref;
sys_cur SYS_REFCURSOR;
BEGIN
NULL;
END;
/