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Union operator is a :

A. Unary Operator

B. Ternary Operator

C. Binary Operator

D. Not an operator

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  1. Relational Algebra is
  2. The _______ is a set of programs to use and / or modify this data.
  3. By ______ an area on disk in certain ways, one can make it represent a bit value of either zero (0)…
  4. Create a table with the following attributes: Employee(EMPNO integer, EMPNAME of 10 characters)
  5. _____is a full form of SQL.
  6. In an E-R diagram double lines indicate
  7. In SQL the word natural can be used with
  8. Change Staff table by removing default of Assistant for position column
  9. ____ table store information about database or about the system.
  10. Employees in a company are each assigned their own office, i.e. for each employee there exists a unique…
  11. Given the following relation S(SNO,SNAME,CITY) write a query to update the value of CITY to KANPUR for…
  12. In a multi-user database, if two users wish to update the same record at the same time, they are prevented…
  13. The rule that a value of a foreign key must appear as a value of some specific table is called a
  14. In SQL, testing whether a subquery is empty is done using
  15. The transactions like adding an employee, enrolling a student in a course are examples of _______
  16. For using a specific database …………… command is used.
  17. The keyword to eliminate duplicate rows from the query result in SQL is
  18. Which of the following statement on the view concept in SQL is invalid?
  19. Data items grouped together for storage purposes are called a
  20. Which of the following is a reason to model data?
  21. Maximum height of a B+ tree of order m with n key values is
  22. A logical schema
  23. In an ER model,_____ is described in the database by storing its data.
  24. The values of the attribute describes a particular
  25. In 2NF
  26. According to the levels of abstraction, the schema at the intermediate level is called
  27. _____ database is used to provide statistical information or summaries of values based on various criteria.
  28. The fact that information in the data warehouse changes far less often and may be regarded as non-real-time…
  29. ………………… approach reduces time and effort required for design…
  30. A relational database developer refers to a record as