A directory of Objective Type Questions covering all the Computer Science subjects. Here you can access and discuss Multiple choice questions and answers for various compitative exams and interviews.

Important Notice!

Dear users, compscibits.com is now permanently moved to compsciedu.com. Please update all your links and bookmarks accordingly. Soon, the site will be accessible through URL compsciedu.com only.

Discussion Forum

Que. A relational schema for a train reservation database is given below. Passenger (pid, pname, age) Reservation (pid, class, tid)

Table: Passenger
pid pname age
0 Sachin 65
1 Rahul 66
2 Sourav 67
3 Anil 69

Table : Reservation
pid class tid
0 AC 8200
1 AC 8201
2 SC 8201
5 AC 8203
1 SC 8204
3 AC 8202
What pids are returned by the following SQL query for the above instance of the tables?
FROM Reservation ,
WHERE class ‘AC’ AND
FROM Passenger
WHERE age > 65 AND
Passenger. pid = Reservation.pid)
a. 1, 0
b. 1, 2
c. 1, 3
d. 1, 5
Answer:1, 3
kavya :(July 23, 2019) what is the solution
Click to Add Comment

Confused About the Answer? Ask for Details Here
Know Explanation? Add it Here

Similar Questions: