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

None of the above worked for my table. I have a table with an unsigned integer as the primary key with values ranging from 0 to 31543. Currently there are over 19 thousand records. I had to modify the column to AUTO_INCREMENT (MODIFY COLUMN'id'INTEGER UNSIGNED NOT NULL AUTO_INCREMENT) and set the seed(AUTO_INCREMENT = 31544) in the same statement.

ALTER TABLE `'TableName'` MODIFY COLUMN `'id'` INTEGER UNSIGNED NOT NULL AUTO_INCREMENT, AUTO_INCREMENT = 31544;