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An evil king has n bottles of wine, and a spy has just poisoned one of them. Unfortunately, they don't know which one it is. The poison is very deadly; just one drop diluted even a billion to one will still kill. Even so, it takes a full month for the poison to take effect. Design a scheme for determining exactly which one of the wine bottles was poisoned in just one month's time while expending O(logn) taste testers.
Compute the functional dependencies which exist in following table. After determining the functional dependencies, transform this table to an equivalent collection of the tables which are in third normal form.
It is not uncommon to have to access the data which reside in different tables, especially when formulating a report.
Produce a scatterplot of Rent vs. Size (square meters of the apartment) for the rental data in rent.
Use Cases Perform a requirements analysis for the Case Study
Controls which need a database to either execute transaction completely or not at all.
Energy in the home, personal energy use and home energy efficiency and Efficient use of ‘waste' heat and renewable heat sources
What is meant by a weak relationship? Provide an example. What is meant by weak entity? What do you understand by relationship degree?
Create a report which identifies five most expensive bicycles. The report must list bicycles in descending order from most expensive to lease expensive, the quantity on hand for each, and the markup percentage for each.
Explain what is the purpose of Database? The purpose of a database is to store information about certain types of objects. Give an example of two related TABLES.
Developers have noticed that EMP table doesn't have an assigned primary key. EMP_ID column has been selected to be the primary key.
List the sequence of relational algebra operations needed to implement the queries.
Using Internet as the research tool for extra information not presented in text, describe why application roles are important part of the security model for databases.
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