This line do not work: (the problem is in the last line)
SELECT Book_Name
FROM Books
WHERE (Year, Faculty) = (SELECT Year, 开发者_高级运维Faculty FROM Books WHERE Book_Id = 1112);
How can I fix it?
SELECT b.Book_Name
FROM Books b
INNER JOIN (Select Year, Faculty From Books Where Book_Id = 1112) b2
ON b.Year = b2.Year and b.Faculty = b2.Faculty
Without Inner Join the alternative is
SELECT b.Book_Name
FROM Books b
WHERE Year In (Select Year From Books Where Book_ID = 1112)
AND Faculty In (Select Faculty From Books Where Book_ID = 1112)
However, if it is homework you should really work this out for yourself :-p
A join is best, but if you can't (because of homework restriction) ,try this:
SELECT
Book_Name
FROM Books
WHERE
Year IN (SELECT Year FROM Books WHERE Book_Id = 1112)
AND Faculty IN (SELECT Faculty FROM Books WHERE Book_Id = 1112)
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