2,538 views
1 votes
1 votes

Manager’s salary details are to be hidden from Employee table. This Technique is called as

  1. Conceptual level Datahiding
  2. Physical level Datahiding
  3. External level Datahiding
  4. Logical level Datahiding

1 Answer

Best answer
2 votes
2 votes

Answer : External level Data hiding

We have 3 form of Schema 

Physical

Conceptual 

External

External Data Level

In the relational model, the external schema also presents data as a set of relations. An external schema specifies a view of the data in terms of the conceptual level. It is tailored to the needs of a particular category of users. Portions of stored data should not be seen by some users and begins to implement a level of security and simplifies the view for these users

Examples:

Students should not see faculty salaries.
Faculty should not see billing or payment data.

Reference : Three Level Database Architecture explanation is here

selected by
Answer:

Related questions

3 votes
3 votes
1 answer
2
go_editor asked Jul 14, 2016
4,038 views
A virtual memory based memory management algorithm partially swaps out a process. This is an example ofshort term schedulinglong term schedulingmedium term schedulingmutu...
2 votes
2 votes
1 answer
3
2 votes
2 votes
3 answers
4