SQL查詢找出票數

Question

我在MS Access中有兩個表。

表1：用戶

ID (auto int) 
Name 

表2：門票

ID (auto int) 
userName (int) (refers to ID in users table) 

如何列出提交的用戶名和門票多少？

Answer 1

這應該給你你想要的結果。您將要使用的聚合函數COUNT()和GROUP BY

SELECT u.name, count(t.username) TicketsSubmitted 
FROM Users u 
INNER JOIN tickets t 
    ON u.id = t.username 
GROUP BY u.name 

Answer 2

計數每個用戶的門票在子查詢，然後列出每個用戶的所有信息。

SELECT u.Name AS UserName, t.ticketCount AS TicketsSubmitted 
FROM users AS u 
INNER JOIN (SELECT COUNT(ID), userName AS ticketCount FROM tickets GROUP BY userName) AS t 
ON u.ID = t.userName 

應該這樣做。

Answer 3

一個表查詢應該允許你查詢這兩個表，並創建第三個你想要的數據。

從Microsoft Office網站下面的鏈接應該爲您提供所需的信息。上述

http://office.microsoft.com/en-us/access-help/create-a-make-table-query-HA010108505.aspx

兩個答案給出可靠的建議進行查詢，以獲得您想要的數據。