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
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
MySQL tutorial-When AUTO_INCREMENT auto-increment encounters 0
DBAs familiar with SQL Server know that if you want to display the auto-increment values in SQL Server, except for the auto-increment columns in the INSERT statement, you also need to
How to insert an auto-increment id data table that is already set to auto-increment.
// Insert_arr (table name, field name, insert value) --- "get the array inserted into the database // public function insert_arr ($ tab_name, $ tab_filed =" ", $
SqlAUTO INCREMENT Field
Auto-increment will generate a unique number when the new record is inserted into the table.
AUTO INCREMENT FieldWe typically want to automatically create a value for the primary key field each time a new record
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))
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
auto-increment will generate a unique number when the new record is inserted into the table. AUTO INCREMENT FieldWe typically want to automatically create a value for the primary key field each time a new record is inserted.We can create a
Simple Method for setting ID field auto-increment when creating a table on SQL server, SQL Field
Open the database table to be set and click the field to be set, such as id. The column attribute table of id appears below.
In column attributes,
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