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Consider a database used to record the marks that students get on different examinations of different course offerings. (a) Construct an E-R diagram for the database that models exams as entities, and uses a ternary relationship.
(b) Construct an alternative E-R diagram that uses only a binary relationship between students and course_offerings. Make sure that only one relationship exists between a particular student and course_offering pair, yet you can represent the marks that a student gets in different exams of a course offering.
(c) Design an E-R diagram for keeping track of the exploits of your favorite sports team. You should store the matches played, the scores in each match, the players in each match, and individual player statistics for each match. Summary statistics should be modeled as derived attributes.
(d) Construct an E-R diagram for a car insurance company whose customers own one or more cars each. Each car has associated with it zero to any number of recorded accidents. (e) A weak entity set can always be made into a strong entity set by adding to its attributes the primary key attributes of its identifying entity set. Outline what sort of redundancy will result if we do so.
Analyse the Case Study documents and produce a Vision document for a software system to meet the needs identified in the Case Study. Make sure your Vision document.
We have implemented the MVC design pattern for Web based database interfaces. However, there are other design patterns that may be directly applicable to PHP programming, or web programming in general.
question 1 entity-relationship er model create an er diagram using the set of requirements provided for oxford city
What problem would you encounter if you wanted to produce a listing by city? How would you solve this problem by altering the file structure?
Draw the E/R diagrams for the business rules
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Construct a loan amortization table, similar to the one shown in table 6-2, showing the principal and interest seperated for the first 6 months of FunSoft's loan.
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Explain the role of a database administrator,the tasks performed by this role and why this role is important in Database Management.
how data warehousing, online transactional databases, and data mining can solve or reduce these difficulties. Be specific.
part a major change definition and facilitating forces1.discuss the differences between a voluntary change and an
Create an update query to select all records in the tblOverPriced, decrease the Price field values by 10%, run and close the query.
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