Question

我在使用链接表时遇到了一些麻烦。我从下面的代码中得到一个“错误：接近”BookName“：语法错误”：

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));

我能够成功创建表book和word。 book表包含列BookName，表word包含列WordName。

Answer 1

此语句在FOREIGN KEY约束后缺少逗号。此外，SQL要求所有表约束都在所有列之后。

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)
);

或者改为使用列约束：

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

链接表上的语法错误

1 个答案: