MYSQL基础----合并查询结果(UNION)

2019独角兽企业重金招聘Python工程师标准>>>

UNION 合并并去重

• employee表

  

• department表

  

• sql

    SELECT * FROM employee
　　UNION
　　SELECT * FROM department; 

![查询](https://static.oschina.net/uploads/img/201612/05000301_90CL.jpg "查询")

UNION ALL合并不去重

• sql

    SELECT * FROM employee
　　UNION ALL
　　SELECT * FROM department; 

![合并不去重](https://static.oschina.net/uploads/img/201612/05000428_efpp.jpg "合并不去重")

转载于:https://my.oschina.net/u/2403701/blog/799831