MySQL update && select
CREATE TABLE `testupdate` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`val` bigint(20) NOT NULL DEFAULT '0',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8
update testupdate
set val = val+1
where id = 1 and @value := val+1;
select @value;