如何在SQLServer中将一个表列记录附加到第二个表中？

我有两张桌子：

员工：

EmployeeID    First Name  Last Name
------------------------------------
    1            ABC          XYZ        
    2            DEF          LMN
    3            GHI          OPQ 

ConversationId   FromUser    ToUser
-----------------------------------
    11              1          2
    22              1          3
    33              2          1
    44              3          2

对话：

EmployeeID    First Name  Last Name
------------------------------------
    1            ABC          XYZ        
    2            DEF          LMN
    3            GHI          OPQ 

ConversationId   FromUser    ToUser
-----------------------------------
    11              1          2
    22              1          3
    33              2          1
    44              3          2

我希望输出如下

ConversationId    FromUserId    ToUserId    FromUser    ToUser
---------------------------------------------------------------
     11              1             2          ABC         DEF
     22              1             3          ABC         GHI
     33              2             1          DEF         ABC
     44              3             2          GHI         DEF

---

两次加入Employee表，一次用于from user，一次用于to user

select c.*, fu.firstname, tu.firstname
from conversation c
join Employee fu on c.FromUser = fu.EmployeeID
join Employee tu on c.ToUser = tu.EmployeeID

试着这样,

SELECT c.conversationId
    ,c.Fromuser AS FromUserId
    ,c.ToUser AS ToUserId
    ,frm.FirstName AS FromUser
    ,t.FirstName AS ToUser 
FROM conversation c
INNER JOIN employee frm ON c.fromuser = frm.EmployeeId
INNER JOIN employee t ON c.touser = t.EmployeeId

---

谢谢你的回复，先生。@Anubrij Chandrat谢谢你的回复@StackUserthank你的回复@贾尔赫