MySQL Query Puzzle

[Peter <peters@xxxxxxxxxxxx>]

Hi All,

I have a  table which contain's some duplicate rows. I just want to 
delete the duplicate records alone
not original records.

Assume my table as look as below

column1 column2
1
	a
1
	a
2
	b
3
	c
3
	c



i want the above table need  to be as below, After executing the mysql 
query.

column1
	column2
1
	a
2
	b
3
	c




Thanks in advance..

Regards
Peter