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Which of the following is a reason to model data?

A. Understand each user's perspective of data

B. Understand the data itself irrespective of the physical representation

C. Understand the use of data across application areas

D. All of the above

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  1. As per equivalence rules for query transformation, selection operation distributes over
  2. Relationships among relationships can be represented in an-E-R model using
  3. DROP is a statement in SQL.
  4. Assume transaction A holds a shared lock R. If transaction B also requests for a shared lock on R.
  5. Which of the following is not a consequence of concurrent operations?
  6. The default level of consistency in SQL is
  7. Which of the following ensures the atomicity of the transaction?
  8. Relational Algebra does not have
  9. A ______ module is typically designed so that it will run on a user workstation or personal computer.
  10. Which of the following is not a recovery technique?
  11. The data models defined by ANSI/SPARC architecture are
  12. A _____ is used to define overall design of the database
  13. approach reduces time and effort required for design and lesser risk in database management.
  14. The _______ is a set of programs to use and / or modify this data.
  15. Dependency preservation is not guaranteed in
  16. The statement that is executed automatically by the system as a side effect of the modification of the…
  17. _____is a full form of SQL.
  18. What is data integrity?
  19. Tree structures are used to store data in
  20. The _____ category includes storage media that can be operated on directly by the computers central…
  21. Maximum height of a B+ tree of order m with n key values is
  22. The one guideline to be followed while designing the database is
  23. The fact that all employees of a particular organization should not have salaries more than $10000 is…
  24. The normalization was first proposed by .
  25. The clause alter table in SQL can be used to
  26. The drawback of shadow paging technique are
  27. In a relational schema, each tuple is divided into fields called
  28. An advantage of the database management approach is
  29. ______is a special type of integrity constraint that relates two relations & maintains consistency across…
  30. The common column is eliminated in