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Find the keys:-
Let R(A, B,C, D) be a relation and suppose it contains the following dependencies: A → B, BC → D, and D → A.
(a) Find all super keys of R.
(b) Find all keys of R.
What are the ethical issues of the movie margin call?
Tim Trainer is asked to create a fun training environment. The business leader wants the employees to enjoy their working life and make sure that they feel fulfilled and rewarded at the after a training experience -- the key to improved performanc..
Identify any additional information you would need to recommend a solution, and explain where you would likely find that information. Discuss any issues you would likely encounter if you were to merge the PTO system to a traditional leave system...
Find two examples of businesses in your local community that attempt to disclaim liability for damage to or loss of bailed property (usually, the disclaimer is in the form of a sign behind a cash register, or language on a ticket stub.)
In the contract, a bonus of $100,000 per day will be paid for each day the project is completed earlier than its expected duration. Evaluate the following alternatives to shorten the project duration and then make a recommendation
Suppose Clinic is augmented to ClinicPlus by the addition of the attribute Appointment, which is unique for every tuple. - This can serve as a primary key. Find the BCNF of ClinicPlus and compare it with the BCNF of Clinic.
Why are information systems vulnerable to destruction, error, and abuse?
Write a 1,050- to 1,400-word paper that describes how you would manage global team communication using technology.
In this video, Dr Greg Martin provides an introduction to research methods, methedology and study design. Specifically he takes a look at qualitative and quantitative research methods including case control studies, cohort studies, observational r..
Find the closure of the set {Instructor, Grade} in School. - Show that X is a super key if and only if X+ is the set of all attributes of R. Hint! For "if " construct X+ step by step.
If we are currently at logical block 10 (the last block accessed was block 10 ) and want to access logical block 4, how many physical blocks must be read from the disk?
internship at Mountain View Realty, a real estate firm that focuses in the North Utah County area. The previous intern developed a spreadsheet listing houses listed and sold during the last several months. She included addresses, location, list pr..
Modern relational database management systems have been around for a relatively short period of time.
What is the role of a DBMS, and what are it advantages - what are its disadvantages?
Draw an ERD for the following problem with attributes, primary keys, cardinalities and participation constraints and specialization, if appropriate
Draw a diagram of, and explain the architecture of a system for serving up dynamic pages from a database. Show the protocols involved, the flow of messages and what types of information the messages contain.
Exit the program (If the user choices 4, the program will exit. If the user chooses 1, 2 or 3, the program will do what the menu item says it will do, and then the menu will appear again.
What is lan based database management system give an example of lan based database management system with a company name
What is the purpose of primary key in a database?
Use Oracle, list ALL system privileges assigned to user HR. Please show screen shot if you can make it!
Write the relational schema, draw its dependency diagram, and identify all dependencies, including all partial and transitive dependencies.
What's Bothering You? You had good reasons to implement tax calculations within the Item class-it makes much more sense than placing it in the other current classes.
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