ALTER TABLE `users` ADD `id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY
ALTER TABLE `users` ADD `id` INT NOT NULL AUTO_INCREMENT UNIQUE FIRST
ALTER TABLE tablename AUTO_INCREMENT = 1ALTER TABLE document MODIFY COLUMN document_id INT auto_increment
ALTER TABLE users AUTO_INCREMENT=1001;ALTER TABLE tbname MODIFY COLUMN columname smallint(5) auto_increment
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)
)