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Q1) Consider the relational database described in Problem 1. Give expressions in tuple relational calculus and domain relational calculus for each of the following queries:
(a) Find the names of all employees who work for company C2 and earn more than $70,000 annually.
(b) Find the names of all employees who are not managers.
(c) Find all the companies that have offices in all the cities in which company C2 has an office.
Need a page and half on concept of organizational intelligence. It must specifically talk about organizational intellignece being outcome of organization's efforts to gather store, process and interpret data.
Express given five loosely described problems carefully in { Instance, Question } form as utilized in "Computers and Intractability". Determine that a list of n numbers has no duplicates.
Indicate the changes (using the shorthand representation) that you would need to make to the original premiere products database desing to support the following requirements.
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.
Show the REA diagram using Microsoft Word
Write the following procedures: woman_wants_to_enter, man_wants_to_enter, woman_leaves, man_leaves, using counters and sychronisation techniques to ensure that the correct behaviour will occur.
Using data mining, it is possible to gather information which has been buried that can be manipulated and cross indexed which could be a valuable information gathering technique for entities.
Relational database is based on fact that data in one table can be tied, or related to data in another table. To do this, database utilizes various types of keys to form or define these relationships.
The data dictionary serves as an important data management tool by? assigning attributes to the data, maintaining data in updated form.
Transform the tables into one or more tables in BCNF. State the primary keys, candidate keys, and referential integrity constraints.
Explain the differences between the storing data in Access and Excel. Why you would use a spreadsheet over the database?
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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