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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.
note on hashing technique
Consider the following database containing five transactions. Let min_sup = 60%. Mine all frequent itemsets using Apriori and FP-growth algorithm. Compare the efficiency of the t
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What are the function of DBA?
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CREATE YOUR DATABASE TABLES Your database project must have a minimum of four tables. Include the SQL scripts used to create the tables in your documentation. Explain the tables
how does Btree differ from a B+ - tree?
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employee(empid,empname,dept,telno,mobno, add,sssno,tinno,WEdates,WEcomp,WEadd,WEpos,WEres) this is a employee record which is need to be normalize.the WE means work experience
Consider the following relational scheme: R (a,b,c,d,e,f) and its corresponding set of FDs {d→ a, be → c, ac → e, b → f, f → d, a → c}. a. Is the following decomposition i) non
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