How can we change MySQL AUTO_INCRMENT starting number?

MySQL AUTO_INCRMENT value starts from 1 but we can change it in following two ways-

With the help of ALTER TABLE query

We can use ALTER The TABLE query changes the starting value of AUTO_INCRMENT as follows - The Chinese translation of

ALTER TABLE table_name AUTO_INCREMENT = value;

Example

is:

Example

Suppose we have created a table having column 'id' as AUTO_INCREMENT. Now if we will insert the values ​​in it then the sequence number would start from 1 as you can see this in following queries −

mysql> Create Table EMP(id int NOT NULL PRIMARY KEY AUTO_INCREMENT, NAME VARCHAR(10));
Query OK, 0 rows affected (0.07 sec)

mysql> Insert Into EMP(Name) Values('Aryan');
Query OK, 1 row affected (0.02 sec)

mysql> Insert Into EMP(Name) Values('Yash');
Query OK, 1 row affected (0.04 sec)

mysql> Select * from EMP;
+----+-------+
| id | NAME  |
+----+-------+
| 1  | Aryan |
| 2  | Yash  |
+----+-------+
2 rows in set (0.00 sec)

Now if we want to change the sequence number afterwards, we need Use ALTER TABLE query to change the value of AUTO_INCREMENT as shown below −

mysql> Alter table emp auto_increment = 10;
Query OK, 2 rows affected (0.25 sec)
Records: 2 Duplicates: 0 Warnings: 0

mysql> Insert Into EMP(Name) Values('Daksh');
Query OK, 1 row affected (0.03 sec)

mysql> Insert Into EMP(Name) Values('Shayra');
Query OK, 1 row affected (0.06 sec)

mysql> Select * from EMP;
+----+--------+
| id | NAME   |
+----+--------+
| 1  | Aryan  |
| 2  | Yash   |
| 10 | Daksh  |
| 11 | Shayra |
+----+--------+
4 rows in set (0.00 sec)

The above query has changed the value of AUTO_INCRMENT to 10, so after inserting the new value, we will get the sequence number starting from 10.

With the help of CREATE TABLE query

We can also change the AUTO_INCRMENT value when creating the table. This can be accomplished by using the CREATE TABLE query to specify the value of AUTO_INCRMENT, as shown below - The Chinese translation of

CREATE TABLE (Column1 INT PRIMARY KEY NOT NULL AUTO_INCREMENT, Column2 data type) AUTO_INCREMENT = value;

Example

is:

Example

mysql> Create Table EMP1(id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, NAME VARCHAR(10)) AUTO_INCREMENT = 100;
Query OK, 0 rows affected (0.11 sec)

The above query is executed when creating the table Specify the value of AUTO_INCREMENT as 100. Now if we insert the value into it, the sequence number will start from 100 instead of the default value 1 as shown below −

mysql> Insert into emp1(name) values('Sohan');
Query OK, 1 row affected (0.04 sec)

mysql> Insert into emp1(name) values('Harshit');
Query OK, 1 row affected (0.05 sec)

mysql> Select * from emp1;
+-----+---------+
| id  | NAME    |
+-----+---------+
| 100 |   Sohan |
| 101 | Harshit |
+-----+---------+
2 rows in set (0.00 sec)

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