Consider the following Database Schema: s (sid, sname, rating, age) b (bid, bname, color) r (sid", bid', date) Where s = reservations, b = boats, and r = reservations. Sailors reserve specific boats Note: An indicates attribute is a key (underlined) Which of the following relational algebra expressions would find the names of sailors who have reserved all boats called BigBoat O (Insid.bid (r) + mbid (oname="Big Boat'(b))] es) Oasid (lasid.bid (r)+ abid (oname='Big Boat (b))) ) Onsname ([nsid.bid (r)+ nbid (oname="BigBoat' (b))). Onsname (asid,bid (r) + xbid (oname='BigBoat'(b))))
Consider the following Database Schema: s (sid, sname, rating, age) b (bid, bname, color) r (sid", bid', date) Where s = reservations, b = boats, and r = reservations. Sailors reserve specific boats Note: An indicates attribute is a key (underlined) Which of the following relational algebra expressions would find the names of sailors who have reserved all boats called BigBoat O (Insid.bid (r) + mbid (oname="Big Boat'(b))] es) Oasid (lasid.bid (r)+ abid (oname='Big Boat (b))) ) Onsname ([nsid.bid (r)+ nbid (oname="BigBoat' (b))). Onsname (asid,bid (r) + xbid (oname='BigBoat'(b))))
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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![Consider the following Database Schema:
s (sid, sname, rating, age)
b (bid, bname, color)
r (sid bid, date)
Where s = reservations, b = boats, and r = reservations. Sailors reserve specific boats
Note: An indicates attribute is a key (underlined)
Which of the following relational algebra expressions would find the names of sailors who have reserved all boats called BigBoat
O (Insid.bid (r) +mbid (oname="Big Boat'(b))]s)
Oasid (lasid,bid (r) + zbid (oname='Big Boat' (b))] )
Onsname ([nsid,bid (r)+ nbid (oname="BigBoat' (b))])
Onsname ([nsid,bid (r) + xbid (oname='BigBoat'(b))) )](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fddfe5df7-9b30-4fcf-8c2e-d124b3eb750e%2F423bcbb7-6e80-48f7-91c5-5bc9e4f840ff%2F2gt8wi_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Consider the following Database Schema:
s (sid, sname, rating, age)
b (bid, bname, color)
r (sid bid, date)
Where s = reservations, b = boats, and r = reservations. Sailors reserve specific boats
Note: An indicates attribute is a key (underlined)
Which of the following relational algebra expressions would find the names of sailors who have reserved all boats called BigBoat
O (Insid.bid (r) +mbid (oname="Big Boat'(b))]s)
Oasid (lasid,bid (r) + zbid (oname='Big Boat' (b))] )
Onsname ([nsid,bid (r)+ nbid (oname="BigBoat' (b))])
Onsname ([nsid,bid (r) + xbid (oname='BigBoat'(b))) )
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