HIVE分组排序问题

答案：

hive> select *,row_number() over (partition by product_no order by start_time desc) from table1;

知识点：

1、row_number

hive (test)> select *, row_number() over (partition by sub order by score) as od from t;

2、rank

hive (test)> select *, rank() over (partition by sub order by score) as od from t;

3、dense_ran

hive (test)> select *, dense_rank() over (partition by sub order by score desc) from t;

业务实例：
统计每个学科的前三名

select * from (select *, row_number() over (partition by sub order by score desc) as od from t ) t where od<=3;

语文成绩是80分的排名是多少

hive (test)> select od from (select *, row_number() over (partition by sub order by score desc) as od from t )t where sub=‘chinese‘ and score=80;

分页查询

hive (test)> select * from (select *, row_number() over () as rn from t) t1 where rn between 1 and 5;