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';
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';
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