Given the following table schemas (definitions) where "bid" is boat id, "brame" is boat name, "sname" is sailor name and "sid" is sailorid: Sailors(sid: integer, sname: string, rating: integer, age: real) Boats(bid: integer, bname: string, color: string) Reserves(sid: integer, bid: integer, day: date) Which one of the below given queries "Finds the names of sailors who have reserved two different boats on the same day. O a SELECT S.sname. FROM Sailors S, Reserves R1, Reserves R2 WHERE (S.sid-R1.sid OR S.sid-R2.sid) AND (R1.day <> R2.day AND R1.bid R2.bid) Ob SELECT S.sname. FROM Sailors S, Reserves R1, Reserves R2 WHERE R1.sid - R2.sid AND R1.day-R2.day AND R1.bid < R2.bid O SELECT S.sname. O FROM Sailors S, Reserves R1, Reserves R2 WHERE R1.sid-R2.sid AND R1.day-R2.day AND R1.bid=R2.bid Od. SELECT S.sname. FROM Sailors S, Reserves R1, Reserves R2 WHERE S.sid-R1.sid AND S.sid-R2.sid AND R1.day-R2.day AND R1.bid -R2.bid SELECT S.sname. FROM Sailors S, Reserves R1, Reserves R2 WHERE S.sid-R1.sid AND S.sid-R2.sid AND R1 day-R2.day AND R1.bid R2.bid

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Given the following table schemas (definitions) where "bid" is boat id, "name" is boat name,
"sname" is sailor name and "sid" is sailorid:
Sailors(sid: integer, sname: string, rating: integer, age: real)
Boats(bid: integer, bname: string, color: string)
Reserves(sid: integer, bid: integer, day: date)
Which one of the below given queries "Finds the names of sailors who have reserved two
different boats on the same day."
SELECT S.sname,
FROM Sailors S, Reserves R1, Reserves R2
WHERE (S.sid - R1.sid OR S.sid - R2.sid)
AND (R1.day <> R2.day AND R1.bid R2.bid)
Ob SELECT S.sname,
FROM Sailors S, Reserves R1, Reserves R2
WHERE R1.sid = R2.sid
AND R1.day-R2.day AND R1.bid <> R2.bid
O SELECT S.sname.
FROM Sailors S, Reserves R1, Reserves R2
WHERE R1.sid-R2.sid
AND R1.day=R2.day AND R1.bid = R2.bid
Od. SELECT S.sname,
FROM Sailors S, Reserves R1, Reserves R2
WHERE S.sid -R1.sid AND S.sid - R2.sid
AND R1.day=R2.day AND R1.bid =R2.bid
O SELECT S.sname.
FROM Sailors S, Reserves R1, Reserves R2
WHERE S.sid - R1.sid AND S.sid - R2.sid
AND R1.day-R2.day AND R1.bid → R2.bid
Transcribed Image Text:Given the following table schemas (definitions) where "bid" is boat id, "name" is boat name, "sname" is sailor name and "sid" is sailorid: Sailors(sid: integer, sname: string, rating: integer, age: real) Boats(bid: integer, bname: string, color: string) Reserves(sid: integer, bid: integer, day: date) Which one of the below given queries "Finds the names of sailors who have reserved two different boats on the same day." SELECT S.sname, FROM Sailors S, Reserves R1, Reserves R2 WHERE (S.sid - R1.sid OR S.sid - R2.sid) AND (R1.day <> R2.day AND R1.bid R2.bid) Ob SELECT S.sname, FROM Sailors S, Reserves R1, Reserves R2 WHERE R1.sid = R2.sid AND R1.day-R2.day AND R1.bid <> R2.bid O SELECT S.sname. FROM Sailors S, Reserves R1, Reserves R2 WHERE R1.sid-R2.sid AND R1.day=R2.day AND R1.bid = R2.bid Od. SELECT S.sname, FROM Sailors S, Reserves R1, Reserves R2 WHERE S.sid -R1.sid AND S.sid - R2.sid AND R1.day=R2.day AND R1.bid =R2.bid O SELECT S.sname. FROM Sailors S, Reserves R1, Reserves R2 WHERE S.sid - R1.sid AND S.sid - R2.sid AND R1.day-R2.day AND R1.bid → R2.bid
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