CREATE TABLE Rooms (RoomId CLOB, roomName CLOB, beds NUMBER, bedType CLOB, maxOccupancy NUMBER, basePrice NUMBER, decor CLOB)
CREATE TABLE Reservations (Code NUMBER, Room CLOB, CheckIn CLOB, CheckOut CLOB, Rate FLOAT, LastName CLOB, FirstName CLOB, Adults NUMBER, Kids NUMBER)

A pie chart for finding the number of the name of rooms booked by some customers whose first name contains ROY.
SELECT roomName, COUNT(roomName) FROM Reservations AS T1 JOIN Rooms AS T2 ON T1.Room = T2.RoomId WHERE FirstName LIKE '%ROY%' GROUP BY roomName
SELECT "roomName", COUNT("roomName") FROM "Reservations" "T1" JOIN "Rooms" "T2" ON "T1"."Room" = "T2"."RoomId" WHERE "FirstName" LIKE '%ROY%' GROUP BY "roomName"