Introduction to SQL
The SQL WHERE clause:

limits the row data are returned.
Both A and B are correct.
Neither A nor B are correct.
limits the column data that are returned.

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Introduction to SQL
Which of the following query finds colors of boats reserved by "Dustin"?

SELECT DISTINCT b.color FROM boats b, reserves r, sailors s WHERE s.sname = 'Dustin' AND s.sid = r.sid AND r.bid = b.bid;
SELECT DISTINCT b.color FROM boats b, reserves r, sailors s WHERE s.sname = 'Dustin' AND s.sid = r.sid
SELECT DISTINCT b.color FROM boats b, sailors s WHERE s.sname = 'Dustin' AND s.sid = b.sid
SELECT DISTINCT b.color FROM boats b, reserves r, sailors s WHERE s.sname = 'Dustin' AND r.bid = b.bid

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