Code to create Parent Child Hierarchy

[uec_gaurav]

Hi,

Can anyone help me, as i have data in 2 column and need to create hierarcy. please refer the example below

Child	Parent
A	B
B	C
C	D
D	D

<colgroup><col width="64" style="width:48pt" span="2"> </colgroup><tbody>
</tbody>

My desired output is as below

Parent	Lvl 1	Lvl 2	Lvl 3
D
D	C
D	C	B
D	C	B	A

<colgroup><col width="64" style="width:48pt" span="4"> </colgroup><tbody>
</tbody>