Mysql需要從table1中獲取一列兩次，然后通過table2的兩個不同列對它們進行排序

Question

事情就是這樣，我有兩個表：

• table1具有intUsersID, varUsersName列

• table2有列intCouriers, intResponsible

intCouriers （具有一些Couriers的intUsersID）和intResponsible （具有一些負責任的intUsersID）

在我的查詢中，我必須看到Couriers和負責人的用戶名是這樣的：

SELECT 
    table1.varUsersName 'Couriers',
    table1.varUsersName 'Responsible'
FROM
    table1 
LEFT JOIN 
    table2 ON table2.intCouriers = table1.intUsersID

然后，我需要一些如何子查詢或加入“ table1.varUsersName'Responsible'”的方法，以同時獲得“ Reponsible”人員。 請幫我。

Answer 1

應該是這個

SELECT table1.varUsersName 'Couriers', table2.varUsersName 'Responsible'
FROM table1 
INNER JOIN table3  on table1.intUsersID = table3.intCouriers
INNER JOIN table1  as Table2 on  table2.intUsersID = table3. intResponsible

Answer 2

SELECT Couriers.varUsersName as "Couriers",
       Responsible.varUsersName as "Responsible"
FROM   `table2` t2
   LEFT JOIN table1 Couriers on Couriers.intUsersID = t2.intCouriers
   LEFT JOIN table1 Responsible on Responsible.intUsersID = t2.intResponsible