Data independence seems that "the application is independent of the access strategy and storage structure of data". In other words, the ability to change the schema definition in one level could not change the schema definition in the next higher level. Two kinds of Data Independence:

• Physical Data Independence: Change in physical level could not affect the logical level.
• Logical Data Independence: Change in logical level could affect the view level.

 

 

 

Posted Date: 7/30/2012 1:35:59 AM | Location : United States

Ask an Expert

Related Discussions:- Define data independence, Assignment Help, Ask Question on Define data independence, Get Answer, Expert's Help, Define data independence Discussions

Write discussion on Define data independence
Your posts are moderated

Write your message here..

Related Questions

Explain the disadvantages of creating a temporary table, Explain the disadv... Explain the disadvantages of creating a temporary table? If you have already created a temporary table with a shown name and attempting to create a second one with that nam

Include the create database command, Submit the SQL Statements necessary to... Submit the SQL Statements necessary to create your database according to the following guidelines: Your SQL statements should exactly mirror your ERD. All primary keys,

Write short notes on relational constraints, Write short notes on relationa... Write short notes on relational constraints? Relational Constraints are: 1. NOT NULL 2. Unique 3. Primary key 4. Foreign key 5. Table check

Gui interfaces, Draw the database using the ER approach and then make the t... Draw the database using the ER approach and then make the tables accordingly. Populate the tables so that every table have at least 10 tuples. Then using Java and SQL, execute the

Stored and derived attributes, Attributes that are directly kept in the dat... Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person.   Derived  Attributes that are not stored directly but can be derived

Queries, Find the names of all Albums that have more than 30 tracks. Result... Find the names of all Albums that have more than 30 tracks. Result: (name: varchar(255))

Eliminate redundant data, Eliminate Redundant Data In the "Database Rel... Eliminate Redundant Data In the "Database Relation" above, the primary key is made up of the D-ID and the Emp-ID. The database-name relies only on the D-ID. The similar databas

What do you understand by data ware house, Question 1: Define the term ... Question 1: Define the term business intelligence tools? Briefly explain how the data from one end gets transformed into information at the other end? Definition Exp

Represent the form as a relational schema, Question: This form represen... Question: This form represents one of a number used for each sailing of a range of boats. A passenger may go on many sailings and will have the same passenger number for each.

Write a short note on built in function in qbe, Write a short note on built... Write a short note on built in function in QBE? Built in function in QBE: QBE involves various built in functions like AVG, MAX,MIN,SUM and CNT. We must prefix these operator