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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. An advantage of the database management approach is
  2. The data models defined by ANSI/SPARC architecture are
  3. The normalization was first proposed by .
  4. _____clause is an additional filter that is applied to the result.
  5. Which one is true statement :
  6. Manager salary details are hidden from the employee .This is
  7. In a relational schema, each tuple is divided into fields called
  8. Which of the syntax is correct for insert statement? i) insert into values ii) insert into (column list)…
  9. What will be the number of columns and rows respectively obtained for the operation, A- B, if A B are…
  10. ____ table store information about database or about the system.
  11. In an E-R diagram double lines indicate
  12. What is data integrity?
  13. Which of the following ensures the atomicity of the transaction?
  14. A table can have only one
  15. A _____ is a logical unit of database processing that includes one or more data access operations that…
  16. For using a specific database command is used.
  17. In SQL the word natural can be used with
  18. Given the following relation S(SNO,SNAME,CITY) write a query to update the value of CITY to KANPUR for…
  19. Maximum height of a B+ tree of order m with n key values is
  20. The statement that is executed automatically by the system as a side effect of the modification of the…
  21. Which of the following aggregate functions does not ignore nulls in its results?.
  22. Wait-for graph is used for
  23. In an E-R, Y is the dominant entity and X is a subordinate entity. Then which of the following is incorrect…
  24. The _____ category includes storage media that can be operated on directly by the computers central…
  25. The values of the attribute describes a particular
  26. The clause in SQL that specifies that the query result should be sorted in ascending or descending order…
  27. operator is used to compare a value to a list of literals values that have been specified.
  28. The ______ language consists of SQL statements for operating on the data (insert, Modify, Delete) in…
  29. Which is the best file organization when data is frequently added or deleted from a file?
  30. A _____ is used to define overall design of the database