如何将第一个函数的返回值调用到第二个函数中?这是第一个计算客户对我店的访问次数的函数:
CREATE OR REPLACE FUNCTION CALCULATE ( NUM CUSTOMER.CUST_VISIT%TYPE)
RETURN NUMBER
IS
V_CUST_VISIT NUMBER(3);
V_COUNT INTEGER;
BEGIN
SELECT CUST_VISIT
INTO V_CUST_VISIT
FROM CUSTOMER, BOOKING
WHERE CUSTOMER.CUST_ID = BOOKING.CUST_ID;
SELECT MAX(COUNT(*))
INTO v_count
FROM BOOKING
GROUP BY CUST_ID
HAVING count(*)>=0;
CASE v_count
WHEN 3 THEN v_cust_visit:= v_count;
DBMS_OUTPUT.PUT_LINE('10% DISCOUNT DUE');
WHEN 6 THEN v_cust_visit:= v_count;
DBMS_OUTPUT.PUT_LINE('20% DISCOUNT DUE');
WHEN 9 THEN v_cust_visit:= v_count;
DBMS_OUTPUT.PUT_LINE('30% DISCOUNT DUE');
ELSE v_cust_visit:= v_count;
DBMS_OUTPUT.PUT_LINE('OOPS NO DISCOUNT DUE YET! AFTER THREE BOOKINGS');
END CASE;
END;
/
Where in the second function:
CREATE OR REPLACE FUNCTION CALC_BILL
(BILL_NUM TREATMENT.TREAT_COST%TYPE)
RETURN NUMBER
IS
CUST_ID VARCHAR2(4);
TREAT_COST NUMBER(10,2);
v_TREAT_cost TREATMENT.TREAT_COST%TYPE;
DISCOUNTED_BILL NUMBER(10,2);
NO_DISCOUNT EXCEPTION;
BEGIN
SELECT TREAT_COST
INTO v_treat_cost
FROM CUSTOMER C, TREATMENT T, TREAT_SESSION TS
WHERE C.CUST_ID = TS.CUST_ID
AND T.TREAT_ID = TS.TREAT_ID;
如果 CALCULATE():= 3 - 这就是我尝试的方式,它没有工作 - 然后 DISCOUNTED_BILL:= v_treat_cost-(v_treat_cost * 0.1);
ELSIF 计算:= 6 然后 DISCOUNTED_BILL:= v_treat_cost-(v_treat_cost * 0.2);
ELSIF 计算:= 9 然后 DISCOUNTED_BILL:= v_treat_cost-(v_treat_cost * 0.3); 其他 提升NO_DISCOUNT;
END IF;
END;
/
答案 0 :(得分:1)
将函数调用分配给变量:
some_number_result := calculate(some_input);
if some_number_result = 1 then
-- do stuff
end if;
等...