题解 | #查找山东大学或者性别为男生的信息#

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";
如果使用 or 判断自动会去重