In MySQL, can I copy one row to insert into the same table?

Question

insert into table select * from table where primarykey=1

I just want to copy one row to insert into the same table (i.e., I want to duplicate an ex

Answer 1

max233 was certainly on the right track, at least for the autoincrement case. However, do not do the ALTER TABLE. Simply set the auto-increment field in the temporary table to NULL. This will present an error, but the following INSERT of all fields in the temporary table will happen and the NULL auto field will obtain a unique value.