Q: select query

I am trying to write a query to select some rows.

My data consists of rows like this

1 a
1 b
1 c
2 d
3 e
3 f
...

I would like to select the second and subsequent rows where the first
column is the same:

1 b
1 c
3 f

in other words, all but the first row of a group.

Any ideas?

Thanks, Ralph