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- O 4. Entity set The ISBN in the image below for "BOOK" Entity type is considered as: Main Sub Annual ISBN Author Title Sal ВОOK O 1. Multi-Valued Attribute O 2. Single Attribute 3. Partial key attribute 4. Key attributeWhat exactly is a business rule, and how does it help with data modeling?What is a Pivot Table? Which features of Pivot Tables do you like the most and how would you use them at work or in daily life?
- A derived attribute can be stored in a table or calculated on each occasion that it is required. An example of a derived attribute is your Grade Point Average which is calculated by adding together a score for each unit (e.g., HD=4, D=3, C=2, P=1, N=0) and dividing that by the number of units you have completed. Explain how the decision as to whether the Grade Point Average would be stored in a table or calculated would be made. You are administering a database in a large retail company that records sales at each of the company’s stores. Tuning the database to improve performance by adding indexes and optimising query execution is an important ongoing aspect of the physical database design. Which attributes in a database such as this (apart from the primary key) are likely to BENEFIT from being indexed? Which attributes would you generally avoid indexing, and why?How can we choose which model to use while constructing our table with Microsoft Access serving as the basis?MVC is an acronym for Model View Controller. How will you use MVC in the stock exchange industry as an example? Any assumptions should be mentioned clearly.
- As of the time of writing, Damon Davis was completing out the paperwork for Drano Plumbing. He estimated a $50,000 net profit would be made. He counted the columns of the balance sheet and knew how much was in the credit column ($300,000) and how much was in the negative column ($400,000). What, in your opinion, was the most plausible reason for the discrepancy in the results? What should he do next to identify the issue's cause if this wasn't the cause of the issue?What exactly is a business rule, and how does it aid data modeling?The rules of business for a company are statements that are formed from a detailed description of the processes that are carried out by the organization, and they are articulated in a manner that is both clear and unambiguous. When it comes to the process of data modeling, what part do business rules play?