1. A Normalization Example
Chapter 9
© 2011 Pearson Education, Inc. Publishing as Prentice Hall

2. Q1. Represent this table in standard Table notation.
STUDENT (STUDENT-NUMBER, STUDENT-NAME, TOTAL-CREDITS, GPA, ADVISOR-NUMBER, ADVISOR-NAME, (COURSE-NUMBER, COURSE-DESC, NUM-CREDITS, GRADE))
© Shelly and Rosenblatt 2011

3. Q2. What form is this table in? Unnormalized? 1NF? 2NF?3NF?
This table is in Unnormalized form.
Why? Because it contains a repeating group.
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4. Steps for Normalization
12/3/2018Chapter 9
© 2011 Pearson Education, Inc. Publishing as Prentice Hall

5. © Shelly and Rosenblatt 2011
Step 1: Convert the table to first normal form and represent it in standard table notation.
STUDENT (STUDENT-NUMBER, STUDENT-NAME, TOTAL-CREDITS, GPA, ADVISOR-NUMBER, ADVISOR-NAME, COURSE-NUMBER, COURSE-DESC, NUM-CREDITS, GRADE)
© Shelly and Rosenblatt 2011

6. © Shelly and Rosenblatt 2011
Step 2: Convert the table to second normal form and represent it in standard table notation.
Step 1: Create Tables with primary keys and combinations
STUDENT (STUDENT-NUMBER, … )
COURSE(COURSE-NUMBER, …)
GRADEINFO(STUDENT-NUMBER, COURSE-NUMBER,…)
Step 2: Add the non-key attributes which are functionally dependent on minimal keys
STUDENT (STUDENT-NUMBER, STUDENT-NAME, TOTAL-CREDITS, GPA, ADVISOR-NUMBER, ADVISOR-NAME)
COURSE(COURSE-NUMBER, COURSE-DESC)
GRADEINFO(STUDENT-NUMBER, COURSE-NUMBER, GRADE)
Step 3: Drop any tables where no additional column is tthere other than primary key.
Step 4:Remaining tables are in 2NF form. Verify that condition for 2NF is satisfied: Table is in 1NF and Every non primary-key attribute is functionally dependent on whole primary key.
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7. © Shelly and Rosenblatt 2011
Step 3 : Convert the table to third normal form and represent it in standard table notation.
Table is in 3NF if it is in 2NF and there are no transitive dependencies (No non-primary key attributes are functionally dependent on each other).
Separate them into a separate table.
STUDENT (STUDENT-NUMBER, STUDENT-NAME, TOTAL-CREDITS, GPA, ADVISOR-NUMBER)
ADVISOR (ADVISOR-NUMBER, ADVISOR-NAME)
COURSE(COURSE-NUMBER, COURSE-DESC)
GRADEINFO(STUDENT-NUMBER, COURSE-NUMBER, GRADE)
© Shelly and Rosenblatt 2011