Introduction to SQL
Which of the following query finds the names of the sailors who have reserved at least one boat?

SELECT DISTINCT s.sname FROM sailors s, reserves r WHERE s.sid = r.sid;
None of These
SELECT DISTINCT s.sname FROM sailors, reserves WHERE s.sid = r.sid;
SELECT s.sname FROM sailors s, reserves r WHERE s.sid = r.sid;

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Introduction to SQL
Find all the cities with temperature, condition and humidity whose humidity is in the range of 63 to 79

SELECT * FROM weather WHERE humidity NOT IN (63 AND 79)
SELECT * FROM weather WHERE humidity IN (63 to 79)
SELECT * FROM weather WHERE humidity NOT BETWEEN 63 AND 79
SELECT * FROM weather WHERE humidity BETWEEN 63 AND 79

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