【面试题】 有一张“学生成绩表”，包含4个字段：班级id、学生id、课程id、成绩。 问题1： 求出每个学生成绩最高的三条记录 问题2： 找出每门课程都高于班级课程平均分的学生 【解题步骤】 1. topN问题 问题1是常见的排名问题（topN问题） ...

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This copy is for your personal, noncommercial use only. New this week by Kenny Chesney with Holly Gleason Morrow The country musician recounts events and encounters that shaped his life and career. 5 ...

Families and MPs campaigning for beds to be saved at a hospice are to hand a petition with more than 15,000 signatures to Number 10 Downing Street. Nine inpatient beds at the Cambridge-based Arthur ...

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