AUTO_INCREMENT in mysql code example

Example 1: how to auto increment in sql

CREATE TABLE Persons (
    Personid int NOT NULL AUTO_INCREMENT,
    LastName varchar(255) NOT NULL,
    FirstName varchar(255),
    Age int,
    PRIMARY KEY (Personid)
);
INSERT INTO Persons (FirstName,LastName)
VALUES ('Lars','Monsen');

Example 2: mysql set id auto increment

ALTER TABLE users AUTO_INCREMENT=1001;

Example 3: set id count mysql

ALTER TABLE name AUTO_INCREMENT=310;

Example 4: create a table with an id in mysql

CREATE TABLE DemoT (
    Personid int NOT NULL AUTO_INCREMENT,
    LastName varchar(111) NOT NULL,
    FirstName varchar(111),
    Age int,
    PRIMARY KEY (Personid)
);

Example 5: auto_increment mysql

ALTER TABLE User AUTO_INCREMENT = 1;

Example 6: auto increment column in mysql query results

SET @auto_increment=0;
SELECT @auto_increment := @auto_increment+1 AS `No`;