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Redundancy is the state where duplicate rows of the same data is available in a database.
Lets say we have an employee database which contains 2 rows of the following data
Emp num Emp Name Age
12345 John 25
12345 John 25
This is data redundancy.
Data redundancy can be avoided by the use of keys in tables. If in the employee table we had defined a primary key condition for employee number, then the system would not allow us to enter 2 rows of the same data.
Wiki User
∙ 15y ago
Redundancy control in databases involves minimizing duplicate data storage to improve efficiency and reduce potential inconsistencies. Techniques such as normalization, using primary keys, and enforcing constraints like unique constraints help prevent redundancy by structuring and managing data effectively. Eliminating redundancy can enhance data integrity, improve query performance, and simplify data maintenance in database systems.
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What is the difference between controlled redundancy and uncontrolled redundancy?
Controlled redundancy refers to intentionally duplicating certain components in a system to ensure reliability and fault tolerance, whereas uncontrolled redundancy occurs unintentionally due to inefficient processes or lack of coordination. Controlled redundancy is planned and managed to enhance system performance, while uncontrolled redundancy can lead to inefficiencies and waste of resources.
What is data redundancy?
Data redundancy refers to the unnecessary duplication of data in a database or system. It can cause inefficiencies, make updates more difficult, and increase storage requirements. Data redundancy can be minimized through normalization techniques in database design.
What is data redundancy and which characteristics of the file system can lead to it?
Data redundancy refers to repetitive data in the database. In a system with redundant data it is difficult to manage the relationships. Data redundancy is the result of poorly designed database. By implying proper constraints on the data it can be prevented.
What are the types of redundancy?
There are three main types of redundancy: hardware redundancy, software redundancy, and information redundancy. Hardware redundancy involves duplicating components to ensure continued operation in case of failure. Software redundancy involves using multiple software modules to perform the same function for fault tolerance. Information redundancy involves storing multiple copies of the same information for backup purposes.
What is the difference between redundancy and duplication?
Redundancy refers to the inclusion of extra components to ensure system reliability, while duplication involves creating an exact copy of something. Redundancy can help prevent system failure by providing backup options, while duplication involves replicating data or information for various purposes.
Is Redundancy in databases a desirable characteristic?
yes
What kind of problems are associated with redundancy in databases?
problems associated with redundancy in data base,Redundancy occurs in same data multiple time tends to several problems some times redundancy controlling is necessary to improve the performance of the query.
What is the difference between controlled redundancy and uncontrolled redundancy?
Controlled redundancy refers to intentionally duplicating certain components in a system to ensure reliability and fault tolerance, whereas uncontrolled redundancy occurs unintentionally due to inefficient processes or lack of coordination. Controlled redundancy is planned and managed to enhance system performance, while uncontrolled redundancy can lead to inefficiencies and waste of resources.
What is the least accurate description of relational databases Choose one answer a They minimize redundancy in data b They are made up of multiple tables c They maintain?
c They maintain hierarchical data structures. This statement is inaccurate because relational databases follow a tabular structure, not a hierarchical one.
Characteristics of an efficient database?
Efficient databases make storing and retrieving of data fast and easy. The characteristics of such databases are, having input constraints, implementing use of unique keys for fields, avoiding data redundancy and maintaining data integrity.
When the same data are stored in many places?
Data redundancy
What are disadvantages of files?
File system data management (or flat-file databases) served as the only method of file storage and retrieval before the advent of database management systems (such as relational databases). While retaining some use, flat-file databases suffer from poor accessibility, data redundancy, lack of standard file access and the inability to organize data.
What are disadvantages of file system?
File system data management (or flat-file databases) served as the only method of file storage and retrieval before the advent of database management systems (such as relational databases). While retaining some use, flat-file databases suffer from poor accessibility, data redundancy, lack of standard file access and the inability to organize data.
What are three types of redundancy checks used in data communications?
coding redundancy interpixel redundancy psycovisual redundancy
When was The Redundancy of Courage created?
The Redundancy of Courage was created in 1991.
What is data redundancy?
Data redundancy refers to the unnecessary duplication of data in a database or system. It can cause inefficiencies, make updates more difficult, and increase storage requirements. Data redundancy can be minimized through normalization techniques in database design.
What are the objectives of operation research?
Planning, control, apt, databases, stains, porter, ganado
