Alias for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE. This shorthand data type is often used to define primary keys.
CREATE TABLE serial_example (
id SERIAL,
data VARCHAR(32)
);SHOW CREATE TABLE serial_example\G*************************** 1. row ***************************
Table: serial_example
Create Table: CREATE TABLE `serial_example` (
`id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`data` varchar(32) DEFAULT NULL,
UNIQUE KEY `id` (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1