爲什麼我的代碼出現錯誤1064？我檢查堆棧溢出，但我不能用代碼

Question

Create Table Items 
(i_num Integer Not Null Primary Key, 
i_title Varchar (50) Not Null, 
d_num Integer Not Null, 
i_price Decimal (6,2) Not Null, 
i_release_date Date Not Null, 
i_genre Varchar (15) Not Null Check 
(i_genre IN ('Jazz', 'Blues', 'Country', 'Rock', 'Alternative', 'Rap', 'Classical', 'Other')), 
Foreign Key (d_num) References Distributors (d_num), 
On Update Cascade 
On Delete Cascade); 

Answer 1

Create Table Distributors (
    d_num Integer Not null 
); 

Create Table Items(
i_num Integer Not Null Primary Key, 
i_title Varchar(50) Not Null, 
d_num Integer Not Null, 
i_price Decimal(6,2) Not Null, 
i_release_date Date Not Null, 
i_genre Varchar(15) Not Null, 
constraint FOREIGN KEY (d_num) REFERENCES Distributors(d_num) ON UPDATE CASCADE ON DELETE CASCADE, 
Constraint ´genre_items_in´ Check (i_genre IN ('Jazz', 'Blues', 'Country', 'Rock', 'Alternative', 'Rap', 'Classical', 'Other')) 
); 

查明錯誤試試這個，當定義級聯你在利用unncessary「」在你的命令符號。