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

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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Concept explainers

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.

Question

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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