Mysql中创建根据第二个自增的id

Mysql中创建根据第二个自增的id

CREATE TABLE main_user(
id INT NOT NULL ,
uid INT NOT NULL AUTO_INCREMENT,
name_ CHAR(16) NOT NULL,
PRIMARY KEY (id,uid)
) ENGINE=MyISAM;
INSERT INTO main_user(id, name_)
VALUES(1,'小明'),(1,'小华'),(2,'小红'),(2,'小吴'),(1,'小花'),(3,'吴老师'),(2,'苍老师');