Data independence refers to the ability of data to be accessed and used without any dependence on how it is stored or organized. The pronunciation of the word "independence" is /ɪndɪˈpɛndəns/. Therefore, the correct phonetic transcription for "data independence" would be /ˈdeɪtə ɪndɪˈpɛndəns/. This term is crucial in databases where it allows for changes to be made to the data storage system without affecting the way the data is accessed and used. Achieving data independence results in more efficient data management and better data clarity.
Data independence refers to the ability to change the data storage and organization in a database system without affecting the application programs that use the data. It is a fundamental concept in database management systems (DBMS) that allows for flexibility and modifiability in handling data.
In a DBMS, data independence can be categorized into two types: logical data independence and physical data independence. Logical data independence refers to the ability to modify the logical structure or schema of the database without impacting the application programs. This means that changes to attributes, relationships, or tables can be made without requiring updates or modifications to the application code.
Physical data independence, on the other hand, refers to the ability to modify the physical storage characteristics of the database without affecting the way data is accessed in the application programs. Changes in physical storage, such as moving data from one storage device to another or changing the storage format, can be made without altering the application code.
Data independence enables system designers and administrators to make necessary changes to the database system, such as performance optimizations or storage reorganization, without disrupting the functionality of the applications that rely on the data. It reduces the complexity and cost associated with maintaining and evolving a database system, allowing for more efficient development and maintenance of applications.
The word "data independence" is formed by combining the words "data" and "independence".
1. Data: The word "data" originated from the Latin word "datum", which means "a thing given" or "something known". It entered the English language in the mid-17th century, initially referring to pieces of information or facts.
2. Independence: The word "independence" originated from the Latin word "independens", which comes from "in-" (meaning "not") and "dependere" (meaning "to hang from" or "to rely on"). It entered the English language in the late 16th century, denoting freedom from control, influence, or reliance on others.
When combined, "data independence" refers to the concept or state of data being free from the control, influence, or reliance on other factors.