make an ID in a mysql table auto_increment (after the fact)

Question

I acquired a database from another developer. He didn\'t use auto_incrementers on any tables. They all have primary key ID\'s, but he did all the incrementing manually, in

Answer 1

Yes, easy. Just run a data-definition query to update the tables, adding an AUTO_INCREMENT column.

If you have an existing database, be careful to preserve any foreign-key relationships that might already be there on the "artificially created" primary keys.