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12. Delete all the authors from AUTHOR table that their books are not found in BOOK table; use DELETE statement with NOT IN operator and
12. Delete all the authors from AUTHOR table that their books are not found in BOOK table; use DELETE statement with NOT IN operator and Sub-query in WHERE clause.
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Real Time Database And Information Systems Research Advances
Authors: Azer Bestavros ,Victor Fay-Wolfe
1st Edition
1461377803, 978-1461377801
