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1.Write two to three paragraphs answering each of the following questions: a What are the three types of database critical events that can trigger the database recovery process? Give some examples for each one. b List and discuss the four transaction properties 2. Research and provide three to five paragraphs covering the following: There are many risks in conducting business on the Internet. Discuss the levels at which security is carried out in web-based database applications. Discuss why security needs to be in place and what kinds of security are needed to secure a database tied to the web. What are the costs of both implementing the security (in terms of designing and implementing security structures and monitoring their use) and the costs of not implementing the security (stolen data, angry customers, system damage, repair time, etc.).
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You have probably seen that already when you tried to create an E-R diagram. Visio uses notation and graphical shapes that are not the same as those in your text. If you look at some of the links to schemas, you will see a similar sort of thing.
mention various steps required to draw an e-r diagram. draw an e-r diagram for student information system. mention all
Examples of non-candidate keys include the following: {name}, {age}. (Note that {gpa} can not be declared as a non-candidate key from this evidence alone even though common sense tells us that clearly more than one student could have the same grade p..
The appropriate SQL command which should be copied from your source code in MySQL and resultant tables, which must be screenshots to show the change due to the execution of the SQL commands
List the first and last names of any customers who have bought all of the items. (This does not need to be as part of a single purchase).
How does Oracle process this query? That is, what does Explain Plan tell you about how the query is processed - how would you recognize that the results were not correct?
The Entity-Relationship Diagram is widely used in the design of relational databases. Why do you think this is so - what is it about this model that makes it the ideal choice for relational database design?
Summarize the difference between on-line transaction processing (OLTP) and online analytic processing (OLAP), and their relationship among business intelligence, data warehousing and data mining.
write a 750- to 1050-word paper in which you complete the followingmiddot choose a database environment from the
What is the cost of joining R and S using a page-oriented simple nested loops join? What is the minimum number of buffer pages required for this cost to remain unchanged?
What about giving same name to attributes which are in different tables but are not same? For instance, "Description" in both a Course table and a Classroom table.
The system should support notifications to management personnel whenever their direct reports have submitted documentation. The system should also notify employees if their deadline to complete professional-development requirements is approaching ..
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