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      从同一个表中获取员工姓名和经理姓名的 SQL 查询

      SQL query to get the employee name and their manager name from the same table(从同一个表中获取员工姓名和经理姓名的 SQL 查询)

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              • 本文介绍了从同一个表中获取员工姓名和经理姓名的 SQL 查询的处理方法,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跟版网的小编来一起学习吧!

                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
                

                employee 表中,有三列Employee_idemployee_namemanager_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

                您可以自行加入表格,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
                

                这篇关于从同一个表中获取员工姓名和经理姓名的 SQL 查询的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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