(1)设置自增

  • 方案一:

    CREATE TABLE IF NOT EXISTS user(
    id INT UNSIGNED AUTO_INCREMENT,
    name VARCHAR(100) NOT NULL,
    sex VARCHAR(40) NOT NULL,
    age INT(11),
    PRIMARY KEY ( id )
    )ENGINE=InnoDB DEFAULT CHARSET=utf8;

  • 方案二:

    alter table user modify id int auto_increment;

(2)设置自增起始值

show variables like 'auto_increment%';

set auto_increment_offset=10;
show variables like 'auto_increment%';

(3)设置自增区间

set auto_increment_increment=10;
show variables like 'auto_increment%';


笔记:
如何修改表名?

alter table old_table rename to new_table;

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Mysql如何设置id自增