How to copy a row and insert in same table with a autoincrement field in MySQL?

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.

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