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

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

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Introduction to SQL
A view is which of the following?

A virtual table that cannot be accessed via SQL commands
A base table that cannot be accessed via SQL commands
A base table that can be accessed via SQL commands
A virtual table that can be accessed via SQL commands

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Introduction to SQL
If a query involves NOT, AND, OR with no parenthesis

NOT will be evaluated first; AND will be evaluated second; OR will be evaluated last.
AND will be evaluated first; OR will be evaluated second; NOT will be evaluated last.
NOT will be evaluated first; OR will be evaluated second; AND will be evaluated last.
The order of occurrence determines the order of evaluation.

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