Display Parent-Child relationship when Parent and Child are stored in same table

Question

I have SQL Server table structure like below:

ID    Name     ParentID
-----------------------
1     Root       NULL
2     Business   1
3     Finance    1
4           


        

Answer 1

This is a simple way:

SELECT ID,Name,(SELECT TOP 1 Name FROM Table t WHERE t.ParentID=ParentID) AS ParentName FROM Table