Consider the following relation: Sailors(sid integer, sname: string, rating: int

Question

Consider the following relation: Sailors(sid integer, sname: string, rating: integer, age: real), where attribute sid is the primary key of the relation, and the following two selection queries ?Q1 : SELECT * FROM Sailors S WHERE S.rating=5 ?Q2: SELECT * FROM Sailors S WHERE S.rating>5 For each of the following indexes, decide whether the index matches the selection condition in query Q1 and in query Q2. You should use the exact definition of when an index matches a selection condition that is given in the textbook on page 398. Explain your answer: ° Index 1: A B+-tree index on rating ° Index 2: A hash index on rating

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