如何統計不同用戶，獲取用戶的最大日期和最新記錄的用戶標識

Question

我想獲取已創建記錄（CreatedDate）的最新日期，UserId和表中唯一用戶的總數。

這是我迄今爲止似乎並沒有工作。

Select UserId, MAX(CreatedDate), Count(Distinct UserID) AS 'Number of Users' 
From DPP_Exports__Customers 

任何人都可以幫忙嗎？

謝謝

伊克巴爾

Answer 1

查詢的最新記錄的用戶名：

select userid,CreatedDate 
from DPP_Exports__Customers 
order by CreatedDate desc limit 1; 

查詢每個用戶的最大日期：

select userid,max(CreatedDate) 
from DPP_Exports__Customers 
group by userid; 

查詢不同的用戶數：

select count(distinct userid) from DPP_Exports__Customers 

所有單號查詢：在一個

select cust.userid,max(cust.CreatedDate) as max_createdDate, 
     (select count(distinct userid) from DPP_Exports__Customers) as distinct_user_count, 
     (select userid from DPP_Exports__Customers order by CreatedDate desc limit 1) as latest_userid 
from DPP_Exports__Customers cust 
group by cust.userid; 

Answer 2

Try it... 

Select GROUP_CONCAT(UserId), MAX(CreatedDate), Count(Distinct UserID)AS 'Number of Users',Max(UserId) as latest_user From DPP_Exports__Customers