从另一个表中选择数据SQL Select查询

Question

Here is 2 Tables that are joined by the StaffID

Job Table
=========
JobID AssignedTo(StaffID) Created By(StaffID)
1     2                   1
2     3                   2

Staff Table
============
StaffID Name
1       May
2       Bob
3       Mary

I need An SQL Statement to get the job details with the corresponding staff name but have problems doing so as i'm unable to differentiate the columns as they are using the same table. The end result should look like this

JobID Assigned To  Created By
1     Bob          May
2     Mary         Bob   

Answer 1

You need to join Staff table twice

select J.JobId, S1.Name AS AssignedTo, S2.Name AS CreatedBy
from Job J
inner join Staff S1 on S1.StaffID = J.AssignedTo
inner join Staff S2 on S2.StaffID = J.CreatedBy