牛客网数据库4：查找所有员工自入职以来的薪水涨幅情况，给出员工编号emp_no以及其对应的薪水涨幅growth，并按照growth进行升序

最新推荐文章于 2021-09-18 19:51:43 发布

原创最新推荐文章于 2021-09-18 19:51:43 发布 · 273 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#牛客网数据库

牛客网数据库专栏收录该内容

9 篇文章

订阅专栏

本文介绍了一种通过SQL查询分析员工自入职以来薪资变化的方法。首先，从'employees'和'salaries'表中分别获取员工当前薪资和入职时薪资。然后，通过连接这两个结果集，计算每位员工的薪资涨幅，并按涨幅升序排列。此方法适用于人力资源部门监测员工薪资调整趋势。

查找所有员工自入职以来的薪水涨幅情况，给出员工编号emp_no以及其对应的薪水涨幅growth，并按照growth进行升序
CREATE TABLE `employees` (
`emp_no` int(11) NOT NULL,
`birth_date` date NOT NULL,
`first_name` varchar(14) NOT NULL,
`last_name` varchar(16) NOT NULL,
`gender` char(1) NOT NULL,
`hire_date` date NOT NULL,
PRIMARY KEY (`emp_no`));
CREATE TABLE `salaries` (
`emp_no` int(11) NOT NULL,
`salary` int(11) NOT NULL,
`from_date` date NOT NULL,
`to_date` date NOT NULL,
PRIMARY KE

链接：https://www.nowcoder.com/questionTerminal/fc7344ece7294b9e98401826b94c6ea5?f=discussion
来源：牛客网

1.找出每个员工当前工资
select e.emp_no,s.salary as sTo 
from employees as e
left join  salaries as s on e.emp_no=s.emp_no where s.to_date='9999-01-01'
2.找出每个员工入职时的工资
select e.emp_no,s.salary as sHire from employees as e
left join  salaries as s on e.emp_no=s.emp_no and s.from_date=e.hire_date
3.结合找出growth
select t1.emp_no,(t1.sTo-t2.sHire) as growth from 
(select e.emp_no,s.salary as sTo from employees as e
left join  salaries as s on e.emp_no=s.emp_no where s.to_date='9999-01-01') as t1 join
(select e.emp_no,s.salary as sHire from employees as e
left join  salaries as s on e.emp_no=s.emp_no and s.from_date=e.hire_date) as t2 on t1.emp_no=t2.emp_no
order by growth asc;

2.
链接：https://www.nowcoder.com/questionTerminal/fc7344ece7294b9e98401826b94c6ea5?f=discussion
来源：牛客网

select a.emp_no, (b.salary - c.salary) as growth
from
    employees as a
    inner join salaries as b
    on a.emp_no = b.emp_no and b.to_date = '9999-01-01'
    inner join salaries as c
    on a.emp_no = c.emp_no and a.hire_date = c.from_date
order by growth asc

Y (`emp_no`,`from_date`));