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An advantage of views is

A. Data security

B. Derived columns

C. Hiding of complex queries

D. All of the above

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  2. The fact that all employees of a particular organization should not have salaries more than $10000 is…
  3. Which of the following is true for network structure?
  4. What is a disjoint less constraint?
  5. Create a table with the following attributes: Employee(EMPNO integer, EMPNAME of 10 characters)
  6. In b-tree the number of keys in each node is than the number of its children.
  7. Between DRAM and magnetic disk storage another form of memory, called ______ memory is becoming common…
  8. Tree structures are used to store data in
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  10. DROP is a statement in SQL.
  11. In SQL, testing whether a subquery is empty is done using
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  13. The size of a data item is called its _______, which can be a field of some record or may be a larger…
  14. Which of the following is not a recovery technique?
  15. The one guideline to be followed while designing the database is
  16. If the closure of an attribute set is the entire relation then the attribute set is a
  17. Processed data is called _____
  18. The metadata is created by the
  19. As per equivalence rules for query transformation, selection operation distributes over
  20. Immediate database modification technique uses
  21. What will be the number of columns and rows respectively obtained for the operation, A- B, if A B are…
  22. Which one is correct statement?Logical data independence provides following without changing application…
  23. In 2NF
  24. Shadow paging has
  25. An advantage of views is
  26. Whenever two independent one-to-many relationships are mixed in the same relation, a __________ arises.
  27. Manager salary details are hidden from the employee .This is
  28. When an E-R diagram is mapped to tables, the representation is redundant for
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  30. Which of the following statement on the view concept in SQL is invalid?