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1. |
Which of the following query finds the total rating of the sailors who have reserved boat "103"? |
A. | SELECT SUM(s.rating) FROM sailors s, reserves r AND r.bid = 103; |
B. | SELECT s.rating FROM sailors s, reserves r WHERE s.sid = r.sid AND r.bid = 103 |
C. | SELECT COUNT(s.rating) FROM sailors s, reserves r WHERE s.sid = r.sid AND r.bid = 103 |
D. | SELECT SUM(s.rating) FROM sailors s, reserves r WHERE s.sid = r.sid AND r.bid = 103 |
Answer» E. | |