错误为：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 '(10)NOT NULL , nameCHAR(50)NOT NULL , Class  CHAR(50)NOT NULL , callCHAR(50)NOT ' at line 2

程序为：

CREATE TABLE A_book (

        num        char(50)NOT NULL ,

        name     CHAR(50)NOT NULL ,

        Class       CHAR(50)NOTNULL ,

        call  CHAR(50)NOT NULL,

        PRIMARY KEY (num)

) ENGINE=MYISAM;

show tables;