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A top-to-bottom relationship among the items in a database is established by a

A. Hierarchical schema

B. Network schema

C. Relational Schema

D. All of the above

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. The concept of mapping of ______ entity types is the concept in which the for each strong entity type…
  2. A weak entity has an ______ dependency on its owner entity, which can be used for both ON UPDATE and…
  3. Use of UNIQUE while defining an attribute of a table in SQL means that the attribute values are
  4. What are the desirable properties of a decomposition
  5. ______is a special type of integrity constraint that relates two relations & maintains consistency across…
  6. Which one is correct statement?Logical data independence provides following without changing application…
  7. The graphical representation of a query is .
  8. Dependency preservation is not guaranteed in
  9. According to the levels of abstraction, the schema at the intermediate level is called
  10. The _______ is a set of programs to use and / or modify this data.
  11. Processed data is called _____
  12. An advantage of the database management approach is
  13. Grant and revoke are _____ statements.
  14. Relational Algebra does not have
  15. The relational model is based on the concept that data is organized and stored in two-dimensional tables…
  16. ………………… approach reduces time and effort required for design…
  17. _____ is a utility to capture a continuous record of server activity and provide auditing capability.
  18. The middleware databases in which the business rules act are applicable to _______ tier architectures
  19. Assume transaction A holds a shared lock R. If transaction B also requests for a shared lock on R.
  20. For correct behaviour during recovery, undo and redo operation must be
  21. The rule that a value of a foreign key must appear as a value of some specific table is called a
  22. DFD stands for
  23. ______contains information that defines valid values that are stored in a column or data type.
  24. What will be the number of columns and rows respectively obtained for the operation, A- B, if A B are…
  25. _____ First proposed the process of normalization.
  26. The ______ key of a relation is the attribute (column) or collection of attributes, which uniquely identify…
  27. The division operator divides a dividend A of degree m+n by a divisor relation B of degree n and produces…
  28. Given the following relation S(SNO,SNAME,CITY) write a query to update the value of CITY to KANPUR for…
  29. SQL server stores index information in the _____system table
  30. In multiple granularity of locks SIX lock is compatible with