鏈接表語法錯誤

Question

我有一些鏈接表的麻煩。從下面的代碼 我得到一個「錯誤：附近‘BOOKNAME’語法錯誤」：

CREATE TABLE word_book (
WordName TEXT(25), FOREIGN KEY (WordName) REFERENCES word (WordName) 
BookName TEXT(25), FOREIGN KEY (BookName) REFERENCES book (BookName) 
PRIMARY KEY (WordName, BookName)); 

我是能夠成功地創建表book和word。 book表包含列BookName，表word包含列WordName。

Answer 1

此聲明在FOREIGN KEY約束後缺少逗號。另外，SQL要求所有表約束出現在所有列之後。

要麼重新排序：

CREATE TABLE word_book (
    WordName TEXT(25), 
    BookName TEXT(25), 
    FOREIGN KEY (WordName) REFERENCES word (WordName), 
    FOREIGN KEY (BookName) REFERENCES book (BookName), 
    PRIMARY KEY (WordName, BookName) 
); 

或者使用列約束，而不是：

CREATE TABLE word_book (
    WordName TEXT(25) REFERENCES word (WordName), 
    BookName TEXT(25) REFERENCES book (BookName), 
    PRIMARY KEY (WordName, BookName) 
);