#1241 - Operand should contain 1 column(s) nested query

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逝去的感伤
逝去的感伤 2020-11-29 04:39

i found this error when I enter this command

SELECT *
FROM  Borrowed_Book , User
WHERE User.UserId=Borrowed_Book.UserId  IN (
SELECT *
FROM Book , Book_versi         


        
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