Functional dependency: A column “X” is said to be functionally dependent on another column “Y”, when at any point of time, a value for “X” determines a single value for “Y”. In other words, a column “X” is said to be functionally dependent on another column “Y”, when two tuples agree on attribute “X” values then they should also agree on attribute “Y” values. It is usually represented as “XY”, where the terms “X” and “Y” are composite. It can be said as either “Y” is functionally dependent on “X” or as “X” functionally determines “Y”. Normalization: Normalization refers to the method of representing a database in the terms of relations, which are in the standard normal forms. It is organized in a table manner to reduce data redundancy and data dependency. Third Normal Form (3NF): A table or a relation is said to be in third normal form if and only if it is in second normal form and if the candidate keys are its only determinants.

Question

The following fields are presented in the table: Member Last Name, MemberFirstName, Street, City, State, ZipCode and MemberFee. The table contains 75,000 documents. How would you build indexes for the table and why would you create these indexes?

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Chapter 2, Problem 3SCG

Program Plan Intro

Functional dependency:

A column “X” is said to be functionally dependent on another column “Y”, when at any point of time, a value for “X” determines a single value for “Y”.

In other words, a column “X” is said to be functionally dependent on another column “Y”, when two tuples agree on attribute “X” values then they should also agree on attribute “Y” values.

It is usually represented as “XY”, where the terms “X” and “Y” are composite.

It can be said as either “Y” is functionally dependent on “X” or as “X” functionally determines “Y”.

Normalization:

Normalization refers to the method of representing a database in the terms of relations, which are in the standard normal forms.

It is organized in a table manner to reduce data redundancy and data dependency.

Third Normal Form (3NF):

A table or a relation is said to be in third normal form if and only if it is in second normal form and if the candidate keys are its only determinants.

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