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

SELECT CH.ID, CH.NAME, ISNULL(PA.NAME, '-') AS "PARENTNAME"
FROM TBL CH
LEFT OUTER JOIN TBL PA
ON CH.PARENTID = PA.ID