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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.
Using your knowledge of Premiere Products, determine the functional dependencies that exist in the following table.
Design a dimensional model for analysing Purchases for Adventure Works Cycles and implement it as cubes using SQL Server Analysis Services. The AdventureWorks OLTP sample database is the data source for you BI analysis.
Draw the E/R diagrams for the business rules
Suppose we are to design a registrar's database to store information about students, courses, the courses students have taken. Convert the E/R diagram into a relational schema.
What is the importance to have a button that takes you back to the main page on each web page? How does dead end or orphan pages affect the continuity of a website?
How many entities are shown by this relation?
Consider a relation schema r(A,B,C,D,E, F) and a set of functional dependencies {A BCD,BCDE,BD,DA}. Determine whether or not (A,E, F) is in BCNF and justify your answer. If (A,E, F) is not in BCNF,find a BCNF decomposition of it.
Design an updateable database for storing customer and sales data. Explain how to deal with the problems of missing data.
Write a query that performs an inner join of the grade, student, and grade_type tables using ANSI SQL 99 syntax (JOIN ON).
Pick one of the different types of SQL statements (data definition language, data manipulation language, or data control language). Describe how that type of statement is use.
Describe the database and describe the four characteristics of the database? Explain the Relational Database and generate a relational database for five employees.
Create Entity-Relationship diagram for a bookstore database, that maintains information about books, professional journals, their authors, and publishers.
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