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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.
asnbspyou approach thenbspend ofnbspthe class you have seen how a database can be set up and accessed.nbspnext you
Instructions: You can use any source you prefer, the text, Internet, etc. The answers should not take more than 1 - 2 paragraphs of text, please submit a word processing document, please make sure it's compatible with MS Word.
Produce a scatterplot of Rent vs. Size (square meters of the apartment) for the rental data in rent.
Explain the difference between the > and > relationships in use case diagrams?
Use Cases Perform a requirements analysis for the Case Study
You have been given the following specifications of a simple database for a netball association that keeps record of players, teams and matches.
"Object-Orientated Databases will eventually supplant Relational Databases and RDBMSs as the predominant data storage / retrieval paradigm.
assignment 4.3 complete problems 1-5 on page 283 of your textbook. test your sql code using oracle xe. once you are
Describe a polynomial-time algorithm to test dependency-preservation.
Write down some of problems and issues related with internet databases? Consider security, performance, architecture issues.
how to optimizing sql server query performance? when optimizing your database server you need to tune the performance
your company has put in the request for a new database system and you have been tasked with architecting the security
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