What is data redundancy and inconsistency in DBMS?
What is data redundancy and inconsistency in DBMS?
Data redundancy occurs when the same piece of data exists in multiple places, whereas data inconsistency is when the same data exists in different formats in multiple tables.
What data inconsistency is and why it occurs?
When the same data exists in different formats in multiple tables. This condition is known as Data Inconsistency. It means that different files contain different information about a particular object or person. This can cause unreliable and meaningless information.
How data inconsistency is reduced in DBMS?
A DBMS can reduce data redundancy and inconsistency by minimizing isolated files in which the same data are repeated. The DBMS may not enable the organization to eliminate data redundancy entirely, but it can help control redundancy.
How do you prevent data inconsistency?
3 Intuitive Proposal of a Method to Reduce the Inconsistency Found in Databases
- Read a string.
- Expand abbreviations andacronyms.
- Remove accents: e.g., A substitutes A´ and A, and a substitutes a´ and a`.
- Shift string to lower-case.
- Remove stop words.
What is data inconsistency in a database?
As a result of the data inconsistency, these files duplicate some data such as addresses and names, compromising data integrity. Anything that affects the data integrity results in data inconsistency, especially if you’re using the database as a System of Record.
What is the difference between data inconsistency and redundancy?
What is data redundancy and data inconsistency? Data redundancy occurs when the same piece of data exists in multiple places, whereas data inconsistency is when the same data exists in different formats in multiple tables. What leads to data inconsistency?
What is data redundancy in DBMS?
Data Redundancy leads to Data Inconsistency. If we have an address of someone in many tables and when we change it in only one table and in another table it may not be updated so there is the problem of data inconsistency may occur. It will be applicable when the duplicate data exists in multiple places in the database.
What is data consistency in DBMS?
In the viewpoint of database users, data should be consistent when two users access to the same data at the same time and can see the same value. In order to guarantee consistency, transaction management like 2PC (two-phase commit protocol) is necessary.