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1.Describe a linear-time (in the size of the set of FDs, where the size of each FD is the number of attributes involved) algorithm for ?nding the attribute closure of a set of attributes with respect to a set of FDs. Prove that your algorithm correctly computes the attribute closure of the input attribute set.
Select an appropriate statistical measure to compare consistency of sales. Make the calculations and write a report. In your calculations, include the mean sales for each salesperson.
Build an entity relationship model for the above scenario. Show all attributes and indicate all of your key attributes in red.
In this Discussion Board, you are asked to define and describe background information of a relational database. Include the following information.
Suppose that we have a ternary relationship R between entity sets A, B, and C such that A has a key constraint and total participation andB has a key constraint
From information system point of view, we should take the key functions of organization and map them to strategic information. Do your companies follow this process or are steps skipped?
How would you change the current design and how does your new design address the problems you have identified with the current design.
You have probably seen that already when you tried to create an E-R diagram. Visio uses notation and graphical shapes that are not the same as those in your text. If you look at some of the links to schemas, you will see a similar sort of thing.
One of the tenets of database development is to never permit developers to create or own objects during development. All objects are created by application owner and stored in that schema.
Determine the steps in the development of an effective Entity Relationship Model (ERM) Diagram and determine the possible iterative steps / factors that one must consider in this process with consideration of the HR core functions and responsibili..
discuss what the role of the database administrator is and why it is such an important role in the company. do we
How to interactively query a database by using SQL statements and SQL*PLUS commands and how to use spool command to save an interactive session within SQL*PLUS.
Map the EER schema into a set of relations. For the VEHICLE to CAR/ TRUCK/ SUV generalization, consider the four options presented
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