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Flights(FlightNo, DeptDateTime, Origin, ArrivalDateTime, Destination, Capacity, SoldSeats) Tickets(FlightNo, Seat, CustID)Where- flightNo is the PK of the flights table- DeptDateTime holds the date and time of the flights departure- Origin holds the airport code (e.g. RKE) of the flights origin- ArrivalDateTime holds the date and time of the flights arrival- Destination holds the airport code (e.g. ATL) of the flights destination- Capacity is the number of passenger seats the flight can hold- SoldSeats is the number of seats that are currently sold- FlightNo+Seat is the PK of the Tickets Table- FlightNo in the Tickets Table is an FK referencing the Flights Table- Seat is the seat assigned to that ticket (e.g. 7B)- CustID is the ID number of the customer that is assigned to that seatWrite a trigger or triggers that:- increments the SoldSeats field when a ticket is inserted- raises an exeception when an attempt to insert a ticket occurs if the flight is already sold out- decrements the SoldSeats field when a ticket is deletedTo provide appropriate transaction control your trigger should lock the associated flight row in the flights table before attempting to update the SoldSeats field.Add sample data and test your triggers.Have your triggers finished with some sample data entered by the start of class on November 16th.
What is Oracle Process? Explain any four processes started by Oracle. Oracle Process is as follows: SMON: The System Monitor carries out a crash recovery while a crashed in
Single-Valued Dependencies A database is a collection of related information and it is therefore inevitable that some items of information in the database would depend on some
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What is NULL? Simply NULL means not in value.
Question: (a) With the help of a diagram, explain the TOGAF framework for enterprise architectures. (b) Where would you position enterprise architectures in an enterpri
Use again the GE Flight Quest Data and build on the work done for homework 1 and 2. The goal is to create a classification model which classifies flights into "on-time" (you can de
Let us first describe the term relationships. What Are Relationships? A relationship can be defined as: A set of associations or connection, or A rule for communic
Horizontal Fragmentation- Horizontal fragmentation groups together the tuples in a relation that are collectively used by the main transactions. A horizontal fragment is produced b
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