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1.Prove that an MVD X →→ Y over a relation R can be expressed as the join dependency ;: {XY, X(R − Y )}.
2.Let R be a relation schema with a set F of FDs. Prove that the decomposition of R into R1 and R2 is lossless-join if and only if F+ contains R1 ∩ R2 → R1 or R1 ∩ R2 → R2.
These are normalization procedures suggested by Shome and Cornell. EQ Tools program permits any of these normalization (or scaling) approaches.
Papers should be created with Microsoft Word in the APA style and have a title page, short abstract, body, and conclusion. The "body" should contain between 1000 and 2000 words and include a Works Cited page, headers and other appropriate APA ele..
Prepare the example of table which is in first normal form but not in second normal form and example of a table which is in second normal form but not in third normal form.
Create a database design (schema) based on the following problem description.
Explain the di?erence between external, internal, and conceptual sche-mas. How are these di?erent schema layers related to the conceptsof logical and physical data independence?
How would you change the current design and how does your new design address the problems you have identified with the current design.
Assume you were a newly hired IT Security Manager at a software development company that in the past hasn't paid much attention to security, especially in its database development processes.
She's come to you for questions regarding connectivity to the Oracle database, which method would you advise her to use to connect to the Oracle database?
write sql dml statements that address the following requirements 1 update the employees table and give all employees
Based on the schema write SQL statements and provide the equivalent relational algebra expressions - relational algebra expressions return and give the equivalent SQL statements.
Which is not a factor to consider in software evaluation?
University XYZ needs a database that keeps track of students, what classes they taken and the grades for each of the classes.
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