我有两个字段名称和工资的表客户。我需要一个函数来 取名字作为参数,并返回匹配的工资形式的客户表sql函数从表中取名并从同一表中返回其工资
CREATE TABLE customers
(
customer_name varchar2(50),
customer_salary number;
);
CREATE FUNCTION customer (c_name IN customers.customer_name%type)
RETURN number; /*return value type*/
IS
sal customers.customer_salary%type;
BEGIN /*Begin*/
SELECT customer_salary into sal
FROM customers
WHERE (c_name = sal);
RETURN sal;
END /*End*/
我这样做,但我不能找到解决办法!