SQL视图：如何创建视图以获得五个不同类别的前5个最高值？

Question

我有一张桌子products与prices和colours列。我需要一个视图来获得每种颜色的五大最昂贵的产品。我该怎么办？

Answer 1

这样做：

 select * from (select a.*,rank() over (partition by colour order by price desc) rk  from 
 tableaname a) where rk<6;

而是这个：

CREATE VIEW view_name AS    select * from (select a.*,rank() over (partition 
by colour order by price desc) rk  from 
tableaname a) where rk<6;