Physical database design issues, Database Management System

Physical Database Design Issues

The database design includes the process of logical design with the use of E-R diagram, normalisation, etc., followed by the physical design.

The Key issues in the Physical Database Design are:

  • The use of physical database design is to alter the logical description of data into the technical specifications for retrieving and storing data for the DBMS.
  • The aim is to create a design for storing data that will give adequate performance and make sure database integrity, recoverability and security.

Some of the basic inputs needed for Physical Database Design are:

  • Normalised relations
  • Attribute definitions
  • Data usage: retrieved, entered, deleted, updated
  • Requirements for security, recovery, backup, retention, integrity
  • DBMS characteristics.
  • Performance criterion such as response time necessity with respect to volume estimates.

Though, for this type of data some of the Physical Database Design Decisions that are to be taken are:

  • Modifying the logical design.
  • Optimising attribute data types.
  • Specifying the file Organisation.
  • Choosing indexes.
Posted Date: 3/7/2013 6:03:39 AM | Location : United States







Related Discussions:- Physical database design issues, Assignment Help, Ask Question on Physical database design issues, Get Answer, Expert's Help, Physical database design issues Discussions

Write discussion on Physical database design issues
Your posts are moderated
Related Questions
Let us first describe the term relationships. What Are Relationships? A relationship can be defined as: A set of associations or connection, or A rule for communic

Question: Using the data model express the following queries in SQL. (a) Create the Table named "Cinema" and make the cinema_code to be the primary key of the relation and

What is completeness constraint on generalization? Define the variation between total and partial design constraint. Give an example each.       Ans: Completeness Constraints

Why 'AS' clause is used in SQL ? 'As' clause is used for Rename operation. ‘AS' clause is used in SQL for rename operation. (e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)

Normalize the following tables upto and including the 3NF. Submit a 1 page printout of only the final set of normalized tables in Data Architect. Just use Data Architect to do the

Q.  Define a weak entity set and its identifying relationship. List the necessary conditions for a meaningful identifying relationship set of a weak entity set.    Entity is a t

Example: RELATIONAL SCHEMA for PERSON: PERSON (PERSON_ID: integer, NAME: string, AGE: integer, ADDRESS: String) RELATION INSTANCE In this instance, m = 3 and n = 4


Identify the need and use of data control through problem solving, illustration

Boyce-Code Normal Form (BCNF) A relationship is said to be in BCNF if it is already in 3NF and the left hand side of each dependency is a candidate key. A relation who is in 3N