Duplicate / Copy records in the same MySQL table

Question

I have been looking for a while now but I can not find an easy solution for my problem. I would like to duplicate a record in a table, but of course, the unique primary key

Answer 1

A late answer I know, but it still a common question, I would like to add another answer that It worked for me, with only using a single line insert into statement, and I think it is straightforward, without creating any new table (since it could be an issue with CREATE TEMPORARY TABLE permissions):

INSERT INTO invoices (col_1, col_2, col_3, ... etc)
  SELECT
    t.col_1,
    t.col_2,
    t.col_3,
    ...
    t.updated_date,
  FROM invoices t;

The solution is working for AUTO_INCREMENT id column, otherwise, you can add ID column as well to statement:

INSERT INTO invoices (ID, col_1, col_2, col_3, ... etc)
  SELECT
    MAX(ID)+1,
    t.col_1,
    t.col_2,
    t.col_3,
    ... etc ,
  FROM invoices t;

It is really easy and straightforward, you can update anything else in a single line without any second update statement for later, (ex: update a title column with extra text or replacing a string with another), also you can be specific with what exactly you want to duplicate, if all then it is, if some, you can do so.