Explain denormalization, and why it may be appropriate to denormalize a set of tables
What will be an ideal response?
Denormalization is the process of taking a normalized set of relations and converting them into a smaller set of relations that is in a lower normal form and thus vulnerable to a greater number of anomalies. While the fully normalized set of relations is more desirable from a theoretical perspective, it does have some disadvantages. The greater the number of relations in the database, the more work that is required by the database whenever data must be retrieved from multiple relations to reconstruct the users' view of the data. In some circumstances, the anomalies introduced by denormalizing a data model may be considered an acceptable cost for the performance improvement from reducing the overhead work performed by the database.
You might also like to view...
________ is the translation of the desired question content and structure into words that respondents can clearly and easily understand
A) The questionnaire design process B) Question wording C) Overcoming inability to answer D) Determining the content of individual questions
Allman, Inc, enters into a call option contract with Betts Investment Co on January 2, 2014 . This contract gives Allman the option to purchase 1,000 shares of Upmann stock at $100 per share. The option expires on April 30, 2014 . Upmann shares are trading at $100 per share on January 2, 2014, at which time Allman pays $200 for the call option. Using the information above, the 1,000 shares of
Upmann stock in this contract is referred to as the a. collateral. b. notional amount. c. option premium. d. derivative.
Which of the following is not a method for a supervisor to use to keep up with the day-to-day performance management duties?
a. Keep an individual file for each direct report b. Think about the performance evaluation two weeks prior to its due date c. Use a performance log d. Have regularly scheduled meetings with employees
Which is an example of a cultural artifact?
a) Clothes b) Values c) Feelings d) All of the above