Describing the Relationship Cardinalities Essay
Order ID 53563633773 Type Essay Writer Level Masters Style APA Sources/References 4 Perfect Number of Pages to Order 5-10 Pages Description/Paper Instructions
Describing the Relationship Cardinalities Essay
Lab Questions (6 @5 points each: total = 30)
Your answers for each question should fill at least 1/2 page. You may use any drawing application to create the designs and then copy/paste the pictures into this document. If you use Visio, just use the flowchart shapes; you may be able to use the Word flowchart auto shapes. You might need to scan your drawing to a .jpg or .bmp or whatever and then paste it here.
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A grocery chain needs a database designed in order to keep track of inventory and sales; the scenario to model is as follows:
A customer goes to one of the stores to make a purchase, which contains one or more products. The employee ID of the cashier will be stored for the purchase; if the customer is a member of the loyalty program, his membership ID will be associated with the purchase as well (although this is not required).
Each product will have a description and current price (applied to all stores); stock inventory count for these products will be tracked for each store.
The purchase amount will be the total of all product prices multiplied by their quantity. After the customer pays, the purchase should be marked as paid, and the stock inventory count for all items in the purchase should be reduced for that store accordingly.
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Q1. Read through the above scenario and determine which entities are involved (identify all of the things and decide whether they are entity classes or attributes). Create a simple ERD to show only the entities and the relationships between them (see the first lecture example). Name the relationships (e.g. “employs”, “schedules”, etc) but do not show the relationship cardinalities nor any of the attributes. It is expected and perfectly OK to have at least one many-to-many and/or ternary relationship here, because these will be changed in the next step.
Q2. Expand the ERD from the previous question by adding the minimum and maximum relationship cardinalities to the model; eliminate any ternary and/or many-to-many relationships from the previous ERD by creating an intersection entity between them. Show optional/mandatory cardinalities and use crows-feet notation to display the “many” sides. Include cardinality for all relationships between two entities.
Q3. Taking each pair of related entities at a time, write one sentence describing the relationship cardinalities (minimum and maximum) in each direction. For example, this relationship
…may be stated:
An employee builds zero to many stoves / A stove is built by exactly one employee.
Q4. Turn four of your entities into relations. Select an attribute(s) to represent the primary key; display this first, underlined. Include other attributes you would expect to find for this entity. Lastly, include any foreign keys which reference other entities; display these in italics.
Example from the FiredUp database:
STOVE (SerialNumber, Type, Version, DateOfManufacture, Color, FK_EmpID)
Q5. What assumptions did you make when you were creating the ERD? Turn these assumptions into questions that you would ask the client in order to continue the design process. Include at least five questions. Be sure to address any ambiguities in the scenario that might affect your design.
Example: Can two or more cashiers both be listed on a single purchase? This would create an M:N relationship that would require an intersection entity to resolve.
Q6. Assume the types of the columns in the SKU_DATA_4 table in Q7 are:
RUBRIC
QUALITY OF RESPONSE NO RESPONSE POOR / UNSATISFACTORY SATISFACTORY GOOD EXCELLENT Content (worth a maximum of 50% of the total points) Zero points: Student failed to submit the final paper. 20 points out of 50: The essay illustrates poor understanding of the relevant material by failing to address or incorrectly addressing the relevant content; failing to identify or inaccurately explaining/defining key concepts/ideas; ignoring or incorrectly explaining key points/claims and the reasoning behind them; and/or incorrectly or inappropriately using terminology; and elements of the response are lacking. 30 points out of 50: The essay illustrates a rudimentary understanding of the relevant material by mentioning but not full explaining the relevant content; identifying some of the key concepts/ideas though failing to fully or accurately explain many of them; using terminology, though sometimes inaccurately or inappropriately; and/or incorporating some key claims/points but failing to explain the reasoning behind them or doing so inaccurately. Elements of the required response may also be lacking. 40 points out of 50: The essay illustrates solid understanding of the relevant material by correctly addressing most of the relevant content; identifying and explaining most of the key concepts/ideas; using correct terminology; explaining the reasoning behind most of the key points/claims; and/or where necessary or useful, substantiating some points with accurate examples. The answer is complete. 50 points: The essay illustrates exemplary understanding of the relevant material by thoroughly and correctly addressing the relevant content; identifying and explaining all of the key concepts/ideas; using correct terminology explaining the reasoning behind key points/claims and substantiating, as necessary/useful, points with several accurate and illuminating examples. No aspects of the required answer are missing. Use of Sources (worth a maximum of 20% of the total points). Zero points: Student failed to include citations and/or references. Or the student failed to submit a final paper. 5 out 20 points: Sources are seldom cited to support statements and/or format of citations are not recognizable as APA 6th Edition format. There are major errors in the formation of the references and citations. And/or there is a major reliance on highly questionable. The Student fails to provide an adequate synthesis of research collected for the paper. 10 out 20 points: References to scholarly sources are occasionally given; many statements seem unsubstantiated. Frequent errors in APA 6th Edition format, leaving the reader confused about the source of the information. There are significant errors of the formation in the references and citations. And/or there is a significant use of highly questionable sources. 15 out 20 points: Credible Scholarly sources are used effectively support claims and are, for the most part, clear and fairly represented. APA 6th Edition is used with only a few minor errors. There are minor errors in reference and/or citations. And/or there is some use of questionable sources. 20 points: Credible scholarly sources are used to give compelling evidence to support claims and are clearly and fairly represented. APA 6th Edition format is used accurately and consistently. The student uses above the maximum required references in the development of the assignment. Grammar (worth maximum of 20% of total points) Zero points: Student failed to submit the final paper. 5 points out of 20: The paper does not communicate ideas/points clearly due to inappropriate use of terminology and vague language; thoughts and sentences are disjointed or incomprehensible; organization lacking; and/or numerous grammatical, spelling/punctuation errors 10 points out 20: The paper is often unclear and difficult to follow due to some inappropriate terminology and/or vague language; ideas may be fragmented, wandering and/or repetitive; poor organization; and/or some grammatical, spelling, punctuation errors 15 points out of 20: The paper is mostly clear as a result of appropriate use of terminology and minimal vagueness; no tangents and no repetition; fairly good organization; almost perfect grammar, spelling, punctuation, and word usage. 20 points: The paper is clear, concise, and a pleasure to read as a result of appropriate and precise use of terminology; total coherence of thoughts and presentation and logical organization; and the essay is error free. Structure of the Paper (worth 10% of total points) Zero points: Student failed to submit the final paper. 3 points out of 10: Student needs to develop better formatting skills. The paper omits significant structural elements required for and APA 6th edition paper. Formatting of the paper has major flaws. The paper does not conform to APA 6th edition requirements whatsoever. 5 points out of 10: Appearance of final paper demonstrates the student’s limited ability to format the paper. There are significant errors in formatting and/or the total omission of major components of an APA 6th edition paper. They can include the omission of the cover page, abstract, and page numbers. Additionally the page has major formatting issues with spacing or paragraph formation. Font size might not conform to size requirements. The student also significantly writes too large or too short of and paper 7 points out of 10: Research paper presents an above-average use of formatting skills. The paper has slight errors within the paper. This can include small errors or omissions with the cover page, abstract, page number, and headers. There could be also slight formatting issues with the document spacing or the font Additionally the paper might slightly exceed or undershoot the specific number of required written pages for the assignment. 10 points: Student provides a high-caliber, formatted paper. This includes an APA 6th edition cover page, abstract, page number, headers and is double spaced in 12’ Times Roman Font. Additionally, the paper conforms to the specific number of required written pages and neither goes over or under the specified length of the paper. GET THIS PROJECT NOW BY CLICKING ON THIS LINK TO PLACE THE ORDER
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