mysql> create table Student(Stu_no int(10) primary key,Stu_name varchar(10) not null,Stu_age int(2),Stu_sex char(2) check(sex='男'or'女') not null,Stu_address varchar(20),Stu_email varchar(20));1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'not null,Stu_address varchar(20),Stu_email varchar(20))' at line 1请问这个要怎么解决啊