Mysql联合查询DQL（九）

union 联合查询 将多条语句的查询结果合并成一条语句的结果 查询部门编号>90 或者邮箱包含a的员工信息web select * from employee where departid>90 or email like '%a%' select * from employee where departid>90 union select * from employee where emai

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