SQL

create table mysql example auto_increment

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CREATE TABLE animals (
     id MEDIUMINT NOT NULL AUTO_INCREMENT,
     name CHAR(30) NOT NULL,
     PRIMARY KEY (id)
);

INSERT INTO animals (name) VALUES
    ('dog'),('cat'),('penguin'),
    ('lax'),('whale'),('ostrich');

SELECT * FROM animals;

add auto increment column mysql

ALTER TABLE `table_name` ADD COLUMN `id` INT AUTO_INCREMENT UNIQUE FIRST;

make a field auto_increment mysql

ALTER TABLE document MODIFY COLUMN document_id INT auto_increment

mysql set id auto increment

ALTER TABLE users AUTO_INCREMENT=1001;

change auto increment mysql

ALTER TABLE tbname MODIFY COLUMN columname smallint(5) auto_increment

mysql auto increment column

CREATE TABLE IF NOT EXISTS blog_users (
        id INT NOT NULL AUTO_INCREMENT,
        email VARCHAR(255) NOT NULL,
        password VARCHAR(255) NOT NULL,
        PRIMARY KEY (id)
    )

insert into auto increment mysql

/* To insert into an auto incrementing field without specifing every column in
the table, you can use the key word default in the place of the auto 
incrementing column*/

INSERT INTO my_table VALUES(default, "test1", 222)
/*VS */
INSERT INTO my_table(name, num) VALUES("test1", 222)
/*Having to type out all of the column names except the auto incrementing one
can be very tedious when you have many columns, just use the keyword defualt
instead and you only have to type it once.

auto increment column in mysql query results

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