Help removing all but the FIRST of duplicate records

[wgre0111]

Greetings,

I am trying to remove duplicate records from a table but preserving one of them using temp tables/etc. Pretty much removing duplicates but leaving one of the identical sets.

Example DATA would like like:

col1, col2, col3
20, 1090, bad
22, 1090, bad
25, 1090, bad
28, 1091, good
2350, 2444, bad
2353, 2444, bad
2370, 2444, bad
3000, 5000, good
3005, 5001, good



AFTER the DELETE sql (which I need help with)
example data (based off of above) should look like


col1, col2, col3
20, 1090, bad
28, 1091, good
2350, 2444, bad
3000, 5000, good
3005, 50001, good


Please notice that one of each of the sets that had duplicates remains.



The records the new sql would need to focus on would be records on col2 With counts(col2) >1 should not have two col2's with data like 1090. All but one of them would need to be deleted. Doesnt matter which one is left.


Please help!