How to update or change auto increment column value in Mysql - mysql

Question

I have a table eav_attribute which have a below structure,
I have mistakenly deleted one record from this table with auto increment attribute id column with value 961.
Now I want that column again with same attribute id value.
But when I am inserting that column it is adding with auto increment value i.e. around 1500.
I want to add new coulmn with attribute id 961
I tried to change set AUTO_INCREMENT to 961 before adding column.
ALTER TABLE eav_attribute AUTO_INCREMENT = 961;
But its not working. Please provide any suggestion.

Answer 1

You can override the auto increment column. For example
MariaDB [sandbox]> drop table if exists t;
Query OK, 0 rows affected (0.14 sec)
MariaDB [sandbox]> create table t (id int auto_increment primary key,val varchar(1));
Query OK, 0 rows affected (0.27 sec)
MariaDB [sandbox]> insert into t (val) values
-> ('a'),('b'),('C');
Query OK, 3 rows affected (0.03 sec)
Records: 3 Duplicates: 0 Warnings: 0
MariaDB [sandbox]>
MariaDB [sandbox]> select * from t;
+----+------+
| id | val |
+----+------+
| 1 | a |
| 2 | b |
| 3 | C |
+----+------+
3 rows in set (0.00 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> delete from t where val = 'b';
Query OK, 1 row affected (0.03 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> select * from t;
+----+------+
| id | val |
+----+------+
| 1 | a |
| 3 | C |
+----+------+
2 rows in set (0.00 sec)
MariaDB [sandbox]> insert into t values (2,'b');
Query OK, 1 row affected (0.02 sec)
MariaDB [sandbox]> select * from t;
+----+------+
| id | val |
+----+------+
| 1 | a |
| 2 | b |
| 3 | C |
+----+------+
3 rows in set (0.00 sec)
MariaDB [sandbox]> show create table t;
+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| t | CREATE TABLE `t` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`val` varchar(1) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=latin1 |
+-------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
I would strongly advice you test this thoroughly...