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Consider an information system designed for an online company which provides IT products and services
These include desktops, laptops, networking products, IT books, parts, and technical support etc. Purchases made through the online store can be collected from various outlets. Individual outlets are responsible for maintaining their respective stocks. The products and services are provided by contracted vendors. The information system can be viewed as a virtual shop which is capable to access all products and services in store across all outlets. Buyers are not aware of the existence of different outlets. In the virtual shop, a buyer can assemble a shopping cart and check out by paying in one transaction using Paypal. The buyer will designate a specific outlet for collection or request shipment.
Briefly describe the system you use as the basis for your analysis.
Quantitative analysis
a. Make an estimation of the size of the product catalogue in your chosen product types. It should include both the number of records and the size of an individual record. State the basis of your estimate.
b. Make an estimation of the number of queries per day, and of the number of purchases. Estimate the size of two years of history of sales including both the number of records and the size of an individual record. State the basis for your estimates.
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
Heap files (unordered file) Mostly these files are unordered files. It is the easiest and most basic type. These files having of randomly ordered records. The records will have
Greater potential for bugs: Since the sites of a distributed system operate simultaneously, it is more complex to ensure the correctness of algorithms. The art of constructing dis
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Boyce-Codd Normal Form (BCNF) The relation NEWSTUDENT (Enrolmentno, Sno, Sname, Cname, Cno,) has every attributes participating in candidate keys as all the attributes are assu
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
Using the questions found at the end of Chapter 9 in your textbook, complete this homework activity. Students will submit a Word document answering questions 2, 3, and 4.
Let us first look into some of the important features of ER model. Entity relationship model is a high-level conceptual data model. It permits us to define the data invo
Update or Modify operation alters the existing values. If these operations alter the value that is the foreign key also, the only check need is the similar as that of the Insert op
how to construct labelled precedence graph for view serialiability.please explain insteps with one solved examples
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