题解 | #查找山东大学或者性别为男生的信息#
查找山东大学或者性别为男生的信息
https://www.nowcoder.com/practice/979b1a5a16d44afaba5191b22152f64a
UNION ALL，连接多个查询结果，不去重
select device_id, gender, age, gpa from user_profile where university = '山东大学' union all select device_id, gender, age, gpa from user_profile where gender = 'male';
