Use INSERT ... SELECT
:
insert into your_table (c1, c2, ...)
select c1, c2, ...
from your_table
where id = 1
where c1, c2, ...
are all the columns except id
. If you want to explicitly insert with an id
of 2 then include that in your INSERT column list and your SELECT:
insert into your_table (id, c1, c2, ...)
select 2, c1, c2, ...
from your_table
where id = 1
You’ll have to take care of a possible duplicate id
of 2 in the second case of course.