Table of Contents
- 1 What is a structural independence and why is it important?
- 2 How does the structural independence differ from the data independence?
- 3 What does structure independent mean?
- 4 What is data independence and why is it lacking in file systems quizlet?
- 5 Why is physical data independence important?
- 6 What is the difference between dependent and independent country?
What is a structural independence and why is it important?
Structural independence can be defined as the ability to make changes in the structure of the database without affecting the user’s ability to operate the data present in the data. Without structural independence, the various databases managing applications may become inoperable.
What is structural independence and why is it important quizlet?
What is structural independence, and why is it important? Structural independence exists when you can change the file structure without affecting the application’s ability to access the data.
How does the structural independence differ from the data independence?
Logical Data Independence is used to change the conceptual scheme without changing the following things : External views. External API or programs….Difference between Physical and Logical Data Independence :
| Physical Data Independence | Logical Data Independence |
|---|---|
| It is concerned with the internal schema. | It is concerned with the conceptual schema. |
What is physical data independence?
Physical data independence is the ability to modify the physical schema without causing application programs to be rewritten. It means we change the physical storage/level without affecting the conceptual or external view of the data. The new changes are absorbed by mapping techniques.
What does structure independent mean?
adjective. 1Independent of structure. 2Linguistics. (of a syntactic rule or operation) not adhering to or bound by the organization of sentences into phrases.
What is structural independence in a database?
Structural independence exists when changes in the database structure do not affect DBMS ability to access data. Structural dependence exists when changes in the database structure do not affect DBMS ability to access data.
What is data independence and why is it lacking in file systems quizlet?
-data inconsistency. -data anomaly. What is data independence, and why is it lacking in file systems? Data storage characteristics is changed without affecting the programs ability to access the data.
Why is structural dependence important?
A file system exhibits structural dependence, which means that access to a file is dependent on its structure. Conversely, structural independence exists when it is possible to make changes in the file structure without affecting the application program’s ability to access the data.
Why is physical data independence important?
Physical data independence helps you to separate conceptual levels from the internal/physical levels. It allows you to provide a logical description of the database without the need to specify physical structures. Compared to Logical Independence, it is easy to achieve physical data independence.
What is the purpose of logical data independence?
Logical data independence is used to separate the external level from the conceptual view. If we do any changes in the conceptual view of the data, then the user view of the data would not be affected. Logical data independence occurs at the user interface level.
What is the difference between dependent and independent country?
A dependent territory is commonly distinguished from a country subdivision by being considered not to be a constituent part of a sovereign state. A dependent territory, conversely, often maintains a great degree of autonomy from its controlling state.
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