如何 select 来自 table 的用户名有多个 userId

Question

用户示例：

==================
Username   UserId
---------- --------
  A         1
  B         2
===============

还有另一个 table 这样的：

================================================
sendUserId    insertUserId    printUserId  .....
--------------------------------------------
    1             2              1  
================================================

我如何创建 select 用户信息的视图：

sendUserName  insertUserName   printUserName
============================================
   A             B                 A

Answer 1

您可以在下面尝试 - 通过加入多个用户 table 实例，如下所示

select u1.Username as sendUserName,u2.Username as insertUserName 
,u3.Username as printUserName
from anothertable
inner join user u1 on sendUserId=u1.userid
inner join user u2 on insertUserId=u2.userid
inner join user u3 on printUserId=u3.userid