MySQL AUTO_INCREMENT is a column attribute that is used to generate a unique numerical value automatically when a new record is inserted into a table. This attribute can be applied to INTEGER or BIGINT columns. When specified the column will start at 1 and increment by 1 for each new record. If no value is specified the default starting value will be is a column attribute that is used to generate a unique number for each new record that is inserted into a table. By default the starting value for AUTO_INCREMENT is 1 and it will increment by 1 for each new record. You can change the starting value and increment amount by using the AUTO_INCREMENT attribute in the CREATE TABLE or ALTER TABLE statements.AUTO_INCREMENT is often used as a primary key column because it is guaranteed to be unique for each row. However you can use AUTO_INCREMENT with any column even if it is not the primary key.MySQL AUTO_INCREMENT is a column attribute that is used to generate a unique number each time a new record is inserted into a table. This can be useful when you need to create a unique identifier for each record in a database table. The AUTO_INCREMENT attribute can be applied to any integer column and the generated number will be sequential.