如何使用加入

Question

我有表像

id  | name  | manager 
1  | A  | 0 
2  | B  | 1 
3  | C  | 2 
4  | D  | 1 

，我想與經理的姓名和ID沿着每個員工的名字。

Answer 1

http://sqlfiddle.com/#!9/438dd7/2

SELECT e.*, 
     e1.name 
FROM employee e 
LEFT JOIN employee e1 
ON e.manager = e1.id 

Answer 2

說你的表名員工和經理

SELECT 
e.id, 
e.name AS empname, 
m.name AS managername 
FROM employee AS e 
INNER JOIN manager AS m ON e.manager = m.id 

希望它會幫助你