Consider the following relational database schema used to keep track of Ship cruise details and passenger reservation details: Ships (Ship_ID, Ship_Name, Manufacturer) Cruises (Cruise_ID, Ship_ID, Start_date, End_date ) Rooms (Room_ID, Cruise_ID, Room_Name, Type) Passenger_Reservation(Reservation_ID,Cruise_ID,Passenger_ID, Room_ID) Passenger (Passenger_ID, SSN, Name, Phone, Address, Gender) Ports (Port_Name, Port_ID, Port_City) Cruise_stay_at_Ports(Cruise_ID, Port_ID) a) Identify domain for each column. b) Identify the primary key and candidate keys in each table. c) Identify the foreign keys and referential integrity constraints. d) Give two example of key, entity integrity, and referential integrity constraints?

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Transaction Processing

Transaction processing is a computational style generally performed by server computers, which supports interactive applications (apps). Transaction processing is also known as information processing, which divides the work into indivisible and individual operations called transactions. The transaction is a set of tasks; a single task is considered as the minimum processing unit that cannot be divided again.