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The database schema is as follows:
AIRPORT(city, country, runways); (the last attribute is the number of runways at an airport)FLIGHT (flightID, day, depart_city, arrive_city, depart_time, arrive_time, plane_type)PLANE(plane_type, capacity)
Write following queries in SQL and relational algebra:
1) Find the airports with a direct flight to Toronto2) Find airports with late flights to Toronto on a big plane. "Late" means departing after 9:00pm; "big" means with capacity 150 passengers or more3) Find cities from which one can fly to Toronto with one change of planes, and using the same type of the aircraft for both legs of the trip.Write following queries in SQL and relational algebra.1) Find flight numbers of flights that use a small (capacity less than 50) plane2) Find all airports with at least 3 runways that have 2 or more flights to Paris a day, or with capacity at least 250.Assumption: (flightId, day) pairs are unique (i.e., there are no two flights with the same flightId on the same day).
Practice on topic of Normalization
Complete (i.e., reverse engineering) ER diagram below such that 4 relation schemas above are exactly result of a translation from the ERD to the relational model.
You should choose a data storage problem of your interest and identify the different pieces of data that should be stored in database.
First, specify the foreign keys for this schema, stating any assumptions you make. Next, populate the relations with a few example tuples.
Assignment 5: Logical Design, Part II, Explain the problems associated with data redundancy as it pertains to effectively using information for reporting and analysis.
Prepare the relational schema for database
Explain how you will visually represent the data for the sales of the individual stores and for the time period shown. You want to show the change in sales for each store over time for the past three years.
What is the key value of the 4th index record on the top level, assuming each index record points to the record with the highest key value in a block of the next level down?
Create a data warehouse for electronics store chain. Chain has 20 stores in 5 cities. Each store has different sections comprising computers, DVDs, TVs, audio, home appliances etc.
Course: data mining. Require a 7 page essay on subjects: Warehouse Architectures: the paper requires to contain information about centralized, federated, and tiered data warehouse.
Write the application for university admissions office. Prompt user for a student's High School Grade Point and an admission test score.
MCIS 630 Database Systems: - Write a recursive SQL query that outputs the names of all subparts of the part with part-id “P- 100”.
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