How To Add A Auto_increment Field To An Existing Table
I want to add a field called "id" starting from 1 and auto increment, but it seems that mysql doesn't allow me to do the following.
alter table existing_table add id INT AUTO_increment;
Message: Incorrect table definition; there can be only one auto column and it must be defined as a key. But I don't have a key or auto column in the existing_table.
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