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CREATE OR REPLACE PROCEDURE proc_staff(in_staff_id staff.staff_id%TYPE) IS
vc_staff_username staff.username%TYPE;
BEGIN
vc_staff_username := func_staff(in_staff_id);
UPDATE staff SET username = vc_staff_username
WHERE staff_id = in_staff_id;
END proc_staff;
/
--Creating function func_instructor_ct
CREATE FUNCTION func_instructor_ct RETURN NUMBER
IS
vn_instructor_ct NUMBER(10);
BEGIN
SELECT COUNT(*)
INTO vn_instructor_ct
FROM instructors;
RETURN vn_instructor_ct;
END func_instructor_ct;
/
SHOW ERRORS;
CREATE OR REPLACE PROCEDURE proc_using_func IS
vn_no_of_instrucctors NUMBER(10)
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