Database normalization | Computer Science homework help

 

Improving Database Design through Normalization

Continue improving the database (tables) you designed in SLP 2. Here are your tasks:

  1. Discuss whether the tables you designed in SLP 2 (in the previous module) have satisfied 1NF, 2NF, and 3NF. Explain why or why not.
  2. Make changes if the tables do not meet the requirement of the 3NF.
  3. Write Oracle SQL statements to create the tables you have designed, and populate the tables with data.

Note: Use the materials in the background reading for your assignment:

  1. Wang, W. (2017). Introduction to SQL (DDL).
    Note: voice-over presentation covering the set of Oracle commands used to create and modify the structure of tables. (Remember that narrated presentations take a little longer to download.)
  2. Wang, W. (2017). Introduction to SQL (DML).
    Using data manipulation language (DML) to work with data.
    Note: Oracle commands that “ask” database questions.
  3. Wang, W. (2017). Add primary key and foreign key to tables using Oracle SQL.
    Note: how to add primary and foreign keys.
  4. Wang, W. (2017). Writing a query using one or more tables.
    Note: techniques used when requesting information from a single table, as well as tables connected to one another.

Please note that since you are the designer of this database, you need to create data to fill in the tables. No need to create a lot of data; 5-10 records of data in each table are sufficient.

SLP Assignment Expectations

Fulfill the following requirements in this assignment:

  • Discuss the requirement for the first, second, and third normal form.
  • Present reasons why or why not the tables in the database you designed have satisfied the three levels of normal form.
  • Discuss what you are going to change so that all your tables satisfy at least the third normal form standard.
  • Write SQL statements to create the structure of the tables, specify primary and foreign keys, and populate the data.
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