PL FUNCTION : 구조 1 SET SERVEROUTPUT ON CREATE OR REPLACE FUNCTION func(p_val IN NUMBER)RETURN NUMBER IS v_val NUMBER; BEGIN v_val := p_val; v_val := v_val*2; RETURN p_val; END; / SELECT func(24) FROM dual; PL FUNCTION : 구조 2 -- (급여와 커미션을 합쳐서 세금을 계산) CREATE OR REPLACE FUNCTION tax2( p_sal IN employees.salary%TYPE, p_bonus IN employees.commission_pct%TYPE) RETURN NUMBER IS BEGIN RETURN (( p_sal + ..