Question

我正在尝试编写一个SQL语句，该语句按员工编号，名称，job_id和修改后的薪水返回员工列表，具体取决于他们的job_id。如果员工是副总裁，则SELECT语句应返回增加％20的薪水，但如果他们是MAN，则应返回增加％30的薪水。没有工会可以返回两个不同的修改工资吗？这是我到目前为止所拥有的。

SELECT 'Employee ', EMPLOYEE_ID, 
'named ', FIRST_NAME || ' ' || LAST_NAME AS "Full Name", 
'with Job ID of ', JOB_ID,
'will have a new salary of ', SALARY
FROM EMPLOYEES
WHERE ROUND(SALARY*1.2,2) IN (SELECT ROUND(SALARY*1.2,2)
FROM EMPLOYEES
WHERE JOB_ID LIKE '%VP')
OR ROUND(SALARY*1.3,2) IN (SELECT ROUND(SALARY*1.3,2)
FROM EMPLOYEES
WHERE JOB_ID LIKE '%MAN');

Answer 1

它更简单：

SELECT 
  'Employee ',
  employee_id, 
  'named ', 
  first_name || ' ' || last_name AS "Full Name", 
  'with Job ID of ',
  job_id,
  'will have a new salary of ', 
  CASE 
    WHEN job_id LIKE '%VP' THEN salary * 1.2
    WHEN job_id LIKE '%MAN' THEN salary * 1.3
    ELSE salary
  END AS modified_salary
FROM employees;

Answer 2

您可以使用case表达式：

SELECT 'Employee ', EMPLOYEE_ID, 
       'named ', FIRST_NAME || ' ' || LAST_NAME AS "Full Name", 
       'with Job ID of ', JOB_ID,
       'will have a new salary of ',
       salary * CASE WHEN job_id LIKE '%VP' THEN 1.2
                     WHEN job_id LIKE '%MAN' THEN 1.3
                     ELSE 1
                END
FROM   EMPLOYEES

SQL修改返回的选择值没有union

2 个答案: