How do you achieve logical data independence?

Logical Data Independence is achieved by modifying the view layer to logical layer mapping (VL-LL mapping).

Why is logical data independence is important?

Logical Data Independence: Logical data independence gives the freedom to change the conceptual level of schema without putting any compulsion of changing the external views and external programs or API. Modifications done at this level are enforced on the logical and end view level mapping.

What is logical data independence and why is it important explain the difference between logical and physical data independence?

The physical data independence is basically used to separate conceptual levels from the internal/physical levels….Difference between Physical and Logical Data Independence :

Physical Data Independence	Logical Data Independence
It is easy to retrieve.	It is difficult to retrieve because the data is mainly dependent on the logical structure of data.

Which is harder to achieve logical data independence and physical data independence?

Logical data independence is more difficult to achieve than physical data independence, since application programs are heavily dependent on the logical structure of the data that they access.

What is logical and physical data model?

A logical data model is a model that describes data as much as possible, without regard to how they will be physically implemented in the database. In contrast, a physical data model is a model that represents how the actual database is built.

What is logical data independence?

Logical data independence is the ability to modify the logical schema without causing application programs to be rewritten. Modifications at the logical level are necessary whenever the logical structure of the database is altered (for example, when money-market accounts are added to banking system).

What is the logical data independence?

What is Logical data independence?

Which of the following is not a Logical data structure Mcq?

è Chain is not a logical database structure to represent the data logically. Hence option 4 is the correct answer.

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