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What happens when I insert the value ‘NULL’ in an AUTO_INCREMENT MySQL column?
When we insert NULL value to AUTO_INCREMENT column, MySQL will return sequence number.
Example
mysql> Create table employee(id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, Name Varchar(10)); Query OK, 0 rows affected (0.16 sec) mysql> Insert into employee(id, Name) values(NULL, 'Gaurav'); Query OK, 1 row affected (0.07 sec) mysql> Select * from employee; +----+---------+ | id | Name | +----+---------+ | 1 | Gaurav | +----+---------+ 1 row in set (0.00 sec)
Updated on: 20-Jun-2020
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