How to work with auto incrementing column in MySQL?

To work with auto incrementing column, you can set it as AUTO_INCREMENT while creating the table.

Let us first create a table. Here, we have set the Id field as column since that would be our auto increment column −

mysql> create table DemoTable
   -> (
   -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> FirstName varchar(20),
   -> LastName varchar(20)
   -> );
Query OK, 0 rows affected (0.71 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable(FirstName,LastName) values('John','Smith');
Query OK, 1 row affected (0.14 sec)

mysql> insert into DemoTable(FirstName,LastName) values('Chris','Brown');
Query OK, 1 row affected (0.13 sec)

mysql> insert into DemoTable(FirstName,LastName) values('Carol','Taylor');
Query OK, 1 row affected (0.21 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

Output

+----+-----------+----------+
| Id | FirstName | LastName |
+----+-----------+----------+
| 1  | John      | Smith    |
| 2  | Chris     | Brown    |
| 3  | Carol     | Taylor   |
+----+-----------+----------+
3 rows in set (0.00 sec)

Rama Giri

Updated on: 30-Jul-2019

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