A ____ key specifies a uniqueness constraint that no two distinct tuples in any state r of relation R can have the same value for super key.

A. Sub

B. Parent

C. Candidate

D. Super

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

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  1. Wait-for graph is used for
  2. The collection of information stored in a database at a particular moment is called as ......
  3. operator is used to compare a value to a list of literals values that have been specified.
  4. In a multi-user database, if two users wish to update the same record at the same time, they are prevented…
  5. The set of all values that can be taken by the attribute is called as _______ of the attribute.
  6. The values of the attribute describes a particular
  7. The _______ is a set of programs to use and / or modify this data.
  8. The one guideline to be followed while designing the database is
  9. Grant and revoke are _____ statements.
  10. The ____ operator joins two or more conditions and displays rows only if that rows data satisfies all…
  11. The fact that all employees of a particular organization should not have salaries more than $10000 is…
  12. Shadow paging has
  13. _____ command can be used to modify a column in a table
  14. ______ keyword is used to find the number of values in a column.
  15. Which of the following relational algebraic operations is not from set theory?
  16. Immediate database modification technique uses
  17. In SQL, testing whether a subquery is empty is done using
  18. The language that requires a user to specify the data to be retrieved without specifying exactly how…
  19. Which two files are used during operation of the DBMS?
  20. What is a disjoint less constraint?
  21. Precedence graphs help to find a
  22. Key to represent relationship between tables is called
  23. Tree structures are used to store data in
  24. The clause alter table in SQL can be used to
  25. ______defines the structure of a relation which consists of a fixed set of attribute-domain pairs.
  26. What are the desirable properties of a decomposition
  27. Create a table with the following attributes: Employee(EMPNO integer, EMPNAME of 10 characters)
  28. _____clause is an additional filter that is applied to the result.
  29. Whenever two independent one-to-many relationships are mixed in the same relation, a __________ arises.
  30. ____ table store information about database or about the system.