select device_id,gender,age,university,gpa from user_profile where (gpa>3.5 and university='山东大学') or (gpa>3.8 and university='复旦大学') select device_id,gender,age,university,gpa from user_profile where gpa>3.5 and university='山东大学' or gpa>3.8 and university='复旦大学' and的优先级要大于or的优先级,所以这里...