How to easy duplicate records

Hi, maybe someone has a good idea how to make an easy (short) duplicating of a record

with huge number of fields, giving it a new id.

Example: I don't want (and sometimes it is very inconvinient) to run

Insert Into my_tab (id, a, b, c, d, ... )

  (Select 2, a, b, c, d, ...

   From my_tab

   Where id = 1)

because of huge number of fields.

Also, I can't do Insert + Update because "id" is unique.

Thanks in advance,

G.R.