PL/SQL函数如何显示加薪和加薪10000以上的工资

Question

CREATE OR REPLACE FUNCTION sal_increase 
    (p_salary f_emps.salary%TYPE, p_percent_incr NUMBER)
    RETURN NUMBER
    IS
    BEGIN
    RETURN (p_salary + (p_salary * p_percent_incr / 100));
    END;

SELECT last_name, salary, sal_increase(salary, 5)
FROM f_emps;

上面的QUERY显示last_name、salary（加薪前）、sal_increase。

如果我想显示一个select语句，只显示工资超过10000的员工？

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Answer 1

使用公用表表达式：

WITH cteSalaries AS (SELECT f.LAST_NAME,
                            f.SALARY AS OLD_SALARY,
                            SAL_INCREASE(f.SALARY, 5) AS NEW_SALARY
                       FROM F_EMPS f)
SELECT c.LAST_NAME,
       c.OLD_SALARY,
       c.NEW_SALARY
  FROM cteSalaries c
  WHERE c.NEW_SALARY > 10000