In an ER model,_____ is described in the database by storing its data.

A. Entity

B. Attribute

C. Relationship

D. Notation

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

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  1. In a multi-user database, if two users wish to update the same record at the same time, they are prevented…
  2. A top-to-bottom relationship among the items in a database is established by a
  3. The values of the attribute describes a particular
  4. The keyword to eliminate duplicate rows from the query result in SQL is
  5. An advantage of views is
  6. Data independence means
  7. The middleware databases in which the business rules act are applicable to _______ tier architectures
  8. Which of the following relational algebra operations do not require the participating tables to be union-compatible?
  9. _____is a full form of SQL.
  10. Union operator is a :
  11. If the closure of an attribute set is the entire relation then the attribute set is a
  12. The _______ is a set of programs to use and / or modify this data.
  13. The collection of information stored in a database at a particular moment is called as ......
  14. DROP is a statement in SQL.
  15. Which of the following relational algebraic operations is not from set theory?
  16. Which of the following is not comparison operator?
  17. Tree structures are used to store data in
  18. The ______ key of a relation is the attribute (column) or collection of attributes, which uniquely identify…
  19. The normalization was first proposed by .
  20. A table can have only one
  21. Which of the following is a reason to model data?
  22. What are the desirable properties of a decomposition
  23. The _____ category includes storage media that can be operated on directly by the computers central…
  24. Dependency preservation is not guaranteed in
  25. The data in the database at a particular moment of time is called the _______
  26. A data type or format is specified for each _________
  27. Between DRAM and magnetic disk storage another form of memory, called ______ memory is becoming common…
  28. Grant and revoke are _____ statements.
  29. The rule that a value of a foreign key must appear as a value of some specific table is called a
  30. Which of the following is not a recovery technique?