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Over 70% of web applications use database to store persistent data. Write down some of problems and issues related with internet databases? Consider security, performance, architecture issues and whatever else is suitable with regard to database. What can be done to solve these problems? Also explain the situations posted by other students. Do you agree or disagree and explain why?
Design a Database schema
Find the average number of books borrowed per member. Take into account that if a member does not borrow any books, then that member does not appear in the borrowed relation at all.
What is the two-phase locking protocol and what is the strict two-phase locking protocol? What is the rigorous two-phase locking protocol? What benefit does strict two-phase locking protocol provide? What benefit does rigorous two-phase locking pr..
List the different entities or objects, logical processes, data flows, and data stores that are involved, starting from the time you submitted your time sheet.
Examples for small n are given bellow, where a small square box represents an unsuccessful search. Prove that leaves of any binary search tree are located in the bottom two levels.
Find the name and membership number of members who have borrowed more than five different books of that publisher.
Create a query that spans both tables. Eliminate redundant fields. Modify the Query to select only those Customers that had service dates in October and November 2006.
Explain the information-gathering techniques and design methods you would suggest to use for project. Recognize the key factors that help ensure the information required for the project.
Create tables in 3NF. As you create the database, include different codes for at least three of the fields. Use sample data to populate fields for at least three records in each table.
What is the order P of the B+-tree if B+-tree access structure on the key is constructed? What is the number of leaf-level blocks needed if blocks are approximately 69% full (round up for convenience)?
Practice on topic of Normalization
Sketch hash table of length 11 which results from using hash function h(i) = (2i + 5) mod 11, to hash the keys 12, 44, 13, 88, 23, 94, 11, and 39,
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