How do I begin auto increment from a specific point in MySQL?

MySQLMySQLi Database

To begin auto increment from a specific point, use ALTER command. The syntax is as follows −

ALTER TABLE yourTableName auto_increment = anySpecificPoint;

To understand the above concept, let us create a table. The query to create a table is as follows −

mysql> create table AutoIncrementSpecificPoint
   −> (
   −> BookId int auto_increment not null,
   −> Primary key(BookId)
   −> );
Query OK, 0 rows affected (0.56 sec)

Now you can insert records using insert command.

The query is as follows −

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.17 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.17 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.09 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.10 sec)

The above insert command begins the value from 1 and adds 1 to the next value. Now you can check all records from table using select statement.

The query is as follows −

mysql> select *from AutoIncrementSpecificPoint;

The following is the output −

+--------+
| BookId |
+--------+
|      1 |
|      2 |
|      3 |
|      4 |
+--------+
4 rows in set (0.00 sec)

Look at the above sample output, the auto_increment starts from 1.

Now to change the auto_increment to begin from a specific point, you can use ALTER command. The query is as follows −

mysql> alter table AutoIncrementSpecificPoint auto_increment = 100;
Query OK, 0 rows affected (0.25 sec)
Records: 0 Duplicates: 0 Warnings: 0

In the above query I have set the auto increment to 100. Let us now insert records once again in the table using insert command. The query is as follows −

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.25 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.18 sec)

mysql> insert into AutoIncrementSpecificPoint values();
Query OK, 1 row affected (0.14 sec)

Display all records from the table using select statement. The query is as follows −

mysql> select *from AutoIncrementSpecificPoint;

The following is the output displaying the other values set for auto increment i.e. beginning from 100 −

+--------+
| BookId |
+--------+
|      1 |
|      2 |
|      3 |
|      4 |
|    100 |
|    101 |
|    102 |
+--------+
7 rows in set (0.00 sec)
raja
Published on 16-Jan-2019 10:38:15
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