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A relational schema for a train reservation database is given below.Passenger (pid, pname, age)Reservation (pid, class, tid)Table: Passengerpid pname age----------------- 0 Sachin 65 1 Rahul 66 2 Sourav 67 3 Anil 69Table : Reservationpid class tid--------------- 0 AC 8200 1 AC 8201 2 SC 8201 5 AC 8203 1 SC 8204 3 AC 8202What pids are returned by the following SQL query for the above instance of the tables?SELECT pidFROM Reservation ,WHERE class ‘AC’ AND EXISTS (SELECT * FROM Passenger WHERE age > 65 AND Passenger. pid = Reservation.pid)(A) 1, 0(B) 1, 2(C) 1, 3(D) 1, 5 |
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