                        课程
                    
                        /数据库
                        
                            /MySQL
                        
                        /与MySQL的零距离接触

为什么带主键约束的数据表创建不了啊？

mysql> CREATE TABLE tb3(

-> id SMALLINT UNSIGNED AUTO_INCREMENT PRIMAYR KEY,

-> username VARCHAR(20) NOT NULL

-> );

ERROR 1064 (42000): 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 'PRIMAYR KEY,

username VARCHAR(20) NOT NULL

)' at line 2

mysql>