Introduction to SQL
When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s):

LIKE only.
IN only.
Both IN and NOT IN.
NOT IN only.

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

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