Which of the following statements is valid? a. SELECT title FROM books WHERE retail < (SELECT cost
Question:
Which of the following statements is valid?
a. SELECT title FROM books
WHERE retail < (SELECT cost FROM books
WHERE isbn = '9959789321');
b. SELECT title FROM books
WHERE retail = (SELECT cost FROM books
WHERE isbn = '9959789321' ORDER BY cost);
c. SELECT title FROM books
WHERE category IN (SELECT cost FROM orderitems
WHERE isbn = '9959789321');
d. None of the above statements
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