Reference no: EM131053977
Consider the relation REFRIG(Model#, Year, Price, Manu plant, Color), which is abbreviated as REFRIG(M, Y, P, MP, C), and the following set F of functional dependencies: F = {M → MP, {M, Y} → P, MP → C}
a. Evaluate each of the following as a candidate key for REFRIG, giving reasons why it can or cannot be a key: {M}, {M, Y}, {M, C}.
b. Based on the above key determination, state whether the relation REFRIG is in 3NF and in BCNF, giving proper reasons.
c. Consider the decomposition of REFRIG into D = {R1(M, Y, P), R2(M, MP, C)}. Is this decomposition lossless? Show why. (You may consult the test under Property NJB in Section 16.2.4.)
|
Identify the possible causes for endometriosis
: What are the most important things that you have learned from this scenario? What actions will you take into clinical practice as a result of your learning from this scenario?
|
|
Management wants to monitor the proportion
: 1) A bank's savings account statements contain 24 items of account information. Last month, 2500 bank statements were checked and 52 errors were found in the account items. What is the dpmo value?
|
|
Calculate gross profit margin and operating profit margin
: AC4410 ACCOUNTING AND FINANCE Coursework. The company chosen for this assignment is BT Group. Use the last 4 years financial statements to calculate the ratios. Gross profit margin, Operating/Net Profit margin and ROCE (rate of capital employed)
|
|
Example of a simple object model
: Give an example of a simple object model that is easier to understand and use than OLE DB, and is frequently used for database applications.
|
|
Evaluate each of the following as a candidate key for refrig
: Consider the decomposition of REFRIG into D = {R1(M, Y, P), R2(M, MP, C)}. Is this decomposition lossless? Show why. (You may consult the test under Property NJB in Section 16.2.4.)
|
|
Marketing vp leads a department of four managers
: Doug is on the phone with the vice president of marketing, pitching to him the benefits of the new Web-based performance appraisal system that HR wants to implement throughout the company. "It will simplify things for you. More importantly, it wil..
|
|
How can we determine their equivalence
: How can we determine their equivalence?
|
|
What normal form is the relation
: If no multivalued attributes exist and no partial dependencies exist in a relation, what normal form is the relation?
|
|
Object oriented interface
: Between ODBC, OLEDB, ADO and JPCD, which one is an object oriented interface that encapsulates data server functionality?
|