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How to get the seed value of an identity column in MySQL?
For this, you can use SHOW VARIABLES command −
mysql> SHOW VARIABLES LIKE 'auto_inc%';
Output
This will produce the following output −
+--------------------------+-------+ | Variable_name | Value | +--------------------------+-------+ | auto_increment_increment | 1 | | auto_increment_offset | 1 | +--------------------------+-------+ 2 rows in set (0.95 sec)
You can control over AUTO_INCREMENT outside.
Let us first create a table −
mysql> create table DemoTable -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY -> ); Query OK, 0 rows affected (0.94 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(); Query OK, 1 row affected (0.44 sec) mysql> insert into DemoTable values(); Query OK, 1 row affected (0.26 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
This will produce the following output −
+-----------+ | StudentId | +-----------+ | 1 | | 2 | +-----------+ 2 rows in set (0.00 sec)
Now you can control over the AUTO_INCREMENT −
mysql> alter table DemoTable AUTO_INCREMENT=1000; Query OK, 0 rows affected (0.50 sec) Records: 0 Duplicates: 0 Warnings: 0
Insert some records in the table using insert command −
mysql> insert into DemoTable values(); Query OK, 1 row affected (0.51 sec) mysql> insert into DemoTable values(); Query OK, 1 row affected (1.37 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
This will produce the following output −
+-----------+ | StudentId | +-----------+ | 1 | | 2 | | 1000 | | 1001 | +-----------+ 4 rows in set (0.00 sec)
Updated on: 30-Jun-2020
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