The EXISTS operator can be used with multiple-row subqueries.
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Q2: A subquery is a complete query nested
Q3: The results of the outer query are
Q4: A multiple-column subquery cannot be nested in
Q5: A group function cannot be included in
Q6: The <ALL operator indicates that for a
Q8: When a multiple-column subquery is used in
Q9: A multiple-row subquery can be nested in
Q10: When used with a multiple-row subquery,the IN
Q11: Valid single-row operators include =,>,<,>=,<=.
Q12: A correlated subquery references one or more
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