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Consider a relation schema r(A,B,C,D,E, F) and a set of functional dependencies {A-> BCD,BC->DE,B->D,D->A}
1) Compute a canonical cover for the above set of functional dependencies (show each step of your derivation with an explanation).
2)Compute the closure of AF and then determine whether or not AF is a candidate key.
To analyse a set of data, and write a memo, identifying and explaining your insights into the operation of Todd Restaurants.
What advantage is there in storing metadata in tables? Is Microsoft Access a DBMS? Why or why not? List the several consequences of a poorly designed database.
You have a company, specializing in managing technology solutions. you have ben just hired by big firm to execute a well-planned strategy.
Design a scheme for determining exactly which one of the wine bottles was poisoned in just one month's time while expending O(logn) taste testers.
Compare the two non-sequential file structure models. What advantages does the first one have over the second and what advantages does the second have over the first?
Write a query to determine the cost of the least expensive part in the part table? Format the returned price in dollars and cents using the correct function.
Input names of students from the user, terminated by ZZZ, and create a data file GRADES with records of the form.
How can you make your database more hacker proof? How do you ensure the security of an organizations distributed database?
Write down the SQL code in order to carrying out the following requests. Display all the data in each of the four tables. Do not display the foreign key columns.
Assume you manage business activity which needs a new IS with a database. The development team is divided on which DBMS you must use. One faction wishes to use oracle,a second wants to use MtSQL, and a third wants to use SQL server.
List the sequence of relational algebra operations needed to implement the queries.
Energy in the home, personal energy use and home energy efficiency and Efficient use of ‘waste' heat and renewable heat sources
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