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Explain why it's a good idea to have DROP TABLE statements at the beginning of your DDL SQL script files that are used to create one or more tables.
Suppose you have a relation schema about teaching classes that has the following attributes: Class, Instructor, Time and Room - based on your understanding of this scenario, what functional dependencies can you identify that hold on this relation?
edinburgh airport officials are concerned about complaints received by the service department and are about to do an
write a program to keep track of a CD or DVD collection. This can only work exclusively with either CDs or DVDs since some of the data is different. The data will be stored ina file. The data from the file will be stored ina text file as records. Eac..
In a "chosen ciphertext attack" the attacker has the option of choosing the ciphertext sample and having it decrypted by someone who knows the key. Wouldn't this result in pure gibberish most of the time?
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.
Create the relational model corresponding to the described application. Basically, list the CREATE TABLE statements with the attribute names, and appropriate data types.
Imagine that you work for a finance industry-based organization. Your organization is looking to submit its database design documentation to an evaluation team in order to meet Sarbanes-Oxley (SOX) compliance. You have been assigned to assist in p..
Explain these situations. When would the database be more beneficial than sequential file? Is it possible for two kinds of permanent storage to be used interchangeably?
List the courses (D-code and C-no), along with the names of the students who are currently taking them. List all the courses (D-code and C-no) that John (i.e., S-Name=''John'') got 'A' grade.
Use MS Visio to create a use case diagram for question 1, a selected class diagram for question 2, and a sequence diagram for question 3.
Find another design pattern which could be used for web based development and write a synopsis on it, pointing out whether it would be applicable for use within your project or not. Comment as applicable on design patterns that other class members..
Identify three potential users and design a subschema for each. Justify your design by explaining why each user needs access to that data element.
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