Oracle中定義方法以及調用方法
-- 定義方法
CREATE OR REPLACE FUNCTION get_user_id(customer_name VARCHAR2)
RETURN NUMBER
IS
cus_id NUMBER(4);
BEGIN
SELECT customerID INTO cus_id
FROM userInfo
WHERE customerName=customer_name;
RETURN cus_id;
END;
-- 調用方法
VAR result NUMBER;
CALL get_user_id('') into :result;
PRINT result;
-- 也可以在查詢中直接調用方法
select * from userInfo where customerID=(get_user_id('username'));