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MyISAM data table
After a record with the maximum number is deleted, the number cannot be reused.
You can use the "auto_increment = N" option to specify an auto-increment initial value when creating a table.
You can use the alter table table_name
How does SQL Server modify the auto-increment column value and corresponding solutions?
A special task encountered in today's work is to change the values of the two auto-incrementing columns.Since the SQL Server platform has previously migrated the
Repeated innodb auto-increment column values
1. duplicate values in the innodb auto-increment column
Start with the problem and reproduce the bug.
use test;drop table t1;create table t1(id int auto_increment, a int, primary key (id))
When migrating a database from MSSQL to MySQL, You need to insert 0 values in the auto-increment column of MySQL based on the requirements of business logic. In MSSQL, this is done as follows:
When migrating a database from MSSQL to MySQL, You need
When you insert A piece of data in Table A and insert data in Table B, you need to add the auto-increment corresponding to the corresponding field in table A. How do you get the auto-increment of Table? Next, we will introduce the auto-increment in
From: http://blog.chinaunix.net/space.php? Uid = 13626447 & Do = Blog & cuid = 392987
Usage:
Create Table Test(Id int unsigned not null primary key auto_increment,Username varchar (15) not null)Auto_increment = 100;
In database
Reset the initial value of AUTO_INCREMENT In the MySQL auto-incrementing ColumnNote that existing data will be deleted using any of the following methods.Method 1:Delete from tb1;Alter table tbl AUTO_INCREMENT = 100;(Benefit, you can set
Reset the initial value of AUTO_INCREMENT In the MySQL auto-incrementing ColumnNote that existing data will be deleted using any of the following methods.
Method 1:Delete from tb1;Alter table tbl AUTO_INCREMENT = 100;(Benefit, you can set
Mysql auto-incrementing column leads to duplicate primary key issue analysis..., mysql primary key
A few days ago, the development of shoes reported a problem of using the load data infile command to import data primary key conflicts. After analysis,
1 description (1) for the MyISAM table, if the auto-increment column is updated using UPDATE, if the column 20540 is repeated with the existing 20540, an error will occur. if the column is greater than the existing maximum 20540 ;, the
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