Question

Select a.states,MAX(a.cnt) from 

(Select ci_location.state as states,Count(CI_Location.State) Cnt from 
Fact_Transactions ft
Inner join CI_Location on ft.ID_Location = CI_Location.ID_Location
Where id_model like 'smsg%'
Group by State)a

Group by a.states,a.Cnt

输出： -

State       Count

Alabama      7
Arizona      15
Arkansas     4
California   100
Colorado     7



   Required output:-

    state    output
    California 100

此代码不是从我的表中提取具有最大计数值的STATE ...有问题吗？

Answer 1

尝试以下

SELECT TOP 1 -- or TOP 1 WITH TIES
  ci_location.state as states,
  Count(CI_Location.State) Cnt
FROM Fact_Transactions ft
INNER JOIN CI_Location ON ft.ID_Location = CI_Location.ID_Location
WHERE id_model like 'smsg%'
GROUP BY ci_location.state
ORDER BY Cnt DESC

Answer 2

您应该使用row_number()函数方法来获取最大计数状态

SELECT * FROM
(
   SELECT
         l.state as states,
         Count(l.State) as Cnt,
         row_number() over (order by Count(l.State) desc) Sq
   FROM Fact_Transactions ft
   INNER JOJN CI_Location l on ft.ID_Location = l.ID_Location
   WHERE l.id_model like 'smsg%'
   GROUP BY l.State
) a
WHERE sq = 1

注意：对于当前查询，您将进一步对派生表结果进行分组。尝试删除GROUP BY条款＆amp;只需使用max（）即可获得最高计数状态。

Answer 3

只需通过

删除组中的a.cnt

从

中选择a.states，MAX（a.cnt）

（选择ci_location.state作为状态，Count（CI_Location.State）Cnt来自 Fact_Transactions ft ft.ID_Location = CI_Location.ID_Location上的内连接CI_Location 其中id_model喜欢'smsg％' 按国家分组）

按a.states分组

从子查询中提取具有最大计数的状态

3 个答案: