mysql increment value

MyISAM Data Sheet After you delete the largest numbered record, the number is not reusable. You can use the "auto_increment=n" option to specify a self-increment initial value when building a table. Use the ALTER TABLE TABLE_NAME AUTO_INCREMENT=N

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

Today found in bulk INSERT, the self-increment primary key is not continuous ....InnoDB auto_increment Lock ModesThis section describes AUTO_INCREMENT the behavior of lock modes used to generate auto-increment values, and how each lock mode aff ECTS

Note: Prior to mysql8.0, the InnoDB storage engine table self-increment ID may be reused.This can cause problems in a number of scenarios, including but not limited to: primary and Standby switching, historical data migration, and other scenarios.

http://blog.sina.com.cn/s/blog_68431a3b0100y04v.htmlMethod 1:TRUNCATE TABLE nameThis will not only delete all the data, but also reposition the increment fieldMethod 2:Delete from your table nameDBCC CHECKIDENT (your table name, reseed,0)Reposition

1 InnoDB The problem of duplicate values in the self-increment columnStart with the problem and reproduce the bugUse Test;drop table t1;create table T1 (ID int. auto_increment, a int, primary key (ID)) Engine=innodb;insert into T1 values INSERT into

"PHP" MySQL gets the primary key for inserting data (self-increment id), MySQL primary key To prevent primary key collisions, the self-increment (auto_increment) field is often used when designing db. So before inserting the data, we often don't

[DB] [MySql] about getting the value of the auto-increment field and @ IDENTITY and concurrency issues Anyone who just switched from Oracle to MySql will be confused that MySql does not have Sequence in Oracle. MySql does not have Sequence. How can

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

Three methods for obtaining the MySQL auto increment Field ValueIt was found in the built-in MySQL docs. The following test program can run: ----------- The statement. getgeneratedkeys () can be obtained only after being inserted first ()1.