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1.Give an algorithm for testing whether a relation scheme is in BCNF. The algorithm should be polynomial in the size of the set of given FDs. (The size is the sum over all FDs of the number of attributes that appear in the FD.) Is there a polynomial algorithm for testing whether a relation scheme is in 3NF?
2.Prove that, if R is in 3NF and every key is simple, then R is in BCNF.
Explain why data flow diagrams are developed in a hierarchy? What are the names of some levels in the hierarchy?
your company has put in the request for a new database system and you have been tasked with architecting the security
Compare activity (quite theoretical) of the disk (in number of bytes) required for each of both relational. Write down the advantages and inconveniences of new relational scheme.
Modify the XML document in Exercise 2 to include a namespace URL from which the elements of the XML document in Exercise 3 will be associated with. Make any changes to the XML document that are necessary as a result of the namespace URL inclusion.
Write down some of problems and issues related with internet databases? Consider security, performance, architecture issues.
Entity relationship model is in wide use as a design tool for relational databases. Why do you think designers have chosen this model, and what makes it an effective design tool?
Give at least three reasons why ETL functions are most challenging in a data warehouse environment.
Write a Assignment to study and modify the PostgreSQL source code, with a focus on one of the core modules - the buffer manager
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 all the business rules for the ABS ( Business rules are important because they define the conditions that the database must meet. For example, every Order must be associated with a valid Product.This prevents invalid Orders being entered into..
E-R diagram specializes a logical graphic model and it doesn't contain any data type or data information in a database.
part 1 - reportwrite a 2000-word report that describes a suitable methodology from the literature for the purpose of
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