CREATE TABLE IF NOT EXISTS `category` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `name` varchar(255) DEFAULT NULL, `belongto` varchar(255) DEFAULT NULL, `about` varchar(255) DEFAULT NULL, PRIMARY KEY (`id`) USING BTREE ) ENGINE=InnoDB DEFAULT CHARSET=utf8; INSERT INTO `category` set id='1', name='html', belongto='0', about='22'; INSERT INTO `category` set id='2', name='css', belongto='0', about='2256'; INSERT INTO `category` set id='3', name='js', belongto='1', about='5422';