本文介绍了SQL查询以从同一张表中获取员工姓名及其经理姓名的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
员工表
Employee_id Employee_name Manager_id
-------------------------------------
Emp00001 Ram Emp00005
Emp00002 Sharath Emp00003
Emp00003 Nivas Emp00005
Emp00004 Praveen Emp00002
Emp00005 Maharaj Emp00002
输出
Employee Name Manager Name
------------------------------
Ram Maharaj
Sharath Nivas
Nivas Maharaj
Praveen Sharath
Maharaj Sharath
在employee
表中,有三列Employee_id
,employee_name
和manager_id
.从表中,如何获取员工姓名和他们的经理姓名?
In the employee
table, there are three columns Employee_id
, employee_name
and manager_id
. From the table, how to fetch the employee name and their manager name?
推荐答案
您可以自联接表以从经理的ID中获取经理的姓名:
You can self-join the table to get the manager's name from his ID:
SELECT e.employee_name, m.employee_name AS manager_name
FROM employee e
JOIN employee m on e.manager_id = m.employee_id
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