mysql设成绩不能超过100
CREATE TABLE `students` ( `id` int(11) NOT NULL PRIMARY KEY, `name` varchar(50) NOT NULL, `score` int(11) NOT NULL, CHECK (`score`>=0 AND `score`
CREATE TABLE `students` ( `id` int(11) NOT NULL PRIMARY KEY, `name` varchar(50) NOT NULL, `score` int(11) NOT NULL, CHECK (`score`>=0 AND `score`
