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Consider a GRADE_BOOK database in which instructors within an academic department record points earned by individual students in their classes. The data requirements are summarized as follows: ¦ Each student is identified by a unique identifier, first and last name, and an e-mail address. ¦ Each instructor teaches certain courses each term. Each course is identified by a course number, a section number, and the term in which it is taught. For each course he or she teaches, the instructor specifies the minimum number of points required in order to earn letter grades A, B, C, D, and F. For example, 90 points for an A, 80 points for a B, 70 points for a C, and so forth. ¦ Students are enrolled in each course taught by the instructor. ¦ Each course has a number of grading components (such as midterm exam, final exam, project, and so forth). Each grading component has a maximum number of points (such as 100 or 50) and a weight (such as 20% or 10%). The weights of all the grading components of a course usually total 100. ¦ Finally, the instructor records the points earned by each student in each of the grading components in each of the courses. For example, student 1234 earns 84 points for the midterm exam grading component of the section 2 course CSc2310 in the fall term of 2009. The midterm exam grading component may have been defined to have a maximum of 100 points and a weight of 20% of the course grade. Design an Enhanced Entity-Relationship diagram for the grade book database and build the design using a data modeling tool such as Visio.
Draw an ER diagram for database scenario. Design a set of 3NF tables for your database scenario.
Discuss why a relational database would be suitable for the organisation in the case study and provide three reasons for this recommendation and discuss using three advantages that a database management system provides to an organisation.
Examples for small n are given bellow, where a small square box represents an unsuccessful search. Prove that leaves of any binary search tree are located in the bottom two levels.
Describe the characteristics of a Relational Database Management System (RDBMS).
Suppose you are asked to evaluate a DBMS in terms of lock granularity and the different locking levels. Create a simple database environment in which these features would be important.
Database Modeling and Design: A complete table diagram. Transform model to tables, include all attributes and keys.
Company XYZ needs a program to build a database concerning employee information.
What is Recovering a database via rollforward? What is aim of transaction log? What is contained in transaction log?
Create the DigitalX database. Design tables and relationships and ensure that email addresses may only be used once in the database.
Find the average number of books borrowed per member. Take into account that if a member does not borrow any books, then that member does not appear in the borrowed relation at all.
These comprise NOT NULL, CHECK, UNIQUE, REFERENTIAL INTEGRITY, and PRIMARY KEY constraints. Are these constraints which we are talking about easy to implement in Access Database?
Write a join query that for every order placed on September 5, 1998, (use '05-SEP-1998') will list the order number and order date along with the customer number, last name, and first name of the customer who placed the order
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