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In a relational schema, each tuple is divided into fields called

A. Relations

B. Queries

C. Domains

D. All of the above

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  1. Precedence graphs help to find a
  2. An advantage of views is
  3. The language that requires a user to specify the data to be retrieved without specifying exactly how…
  4. Which of the following is not comparison operator?
  5. The fact that all employees of a particular organization should not have salaries more than $10000 is…
  6. The normal form that is not necessarily dependency preserving is
  7. Which of the following ensures the atomicity of the transaction?
  8. Use of UNIQUE while defining an attribute of a table in SQL means that the attribute values are
  9. The clause alter table in SQL can be used to
  10. A _____ is a logical unit of database processing that includes one or more data access operations that…
  11. It is an abstraction through which relationships are treated as higher level entities
  12. The middleware databases in which the business rules act are applicable to _______ tier architectures
  13. Isolation of the transactions is ensured by
  14. The collection of information stored in a database at a particular moment is called as ......
  15. The transactions like adding an employee, enrolling a student in a course are examples of _______
  16. As per equivalence rules for query transformation, selection operation distributes over
  17. ………………… approach reduces time and effort required for design…
  18. Which of the following is a reason to model data?
  19. In an ER diagram the ___shape specifies the Attibute and a ____ shape specifies the primary key attribute.
  20. What is a disjoint less constraint?
  21. Which of the following constitutes a basic set of operations for manipulating relational data?
  22. Wait-for graph is used for
  23. Given the following relation S(SNO,SNAME,CITY) write a query to update the value of CITY to KANPUR for…
  24. A data type or format is specified for each _________
  25. If the closure of an attribute set is the entire relation then the attribute set is a
  26. ______defines the structure of a relation which consists of a fixed set of attribute-domain pairs.
  27. In 2NF
  28. The _______ is a set of programs to use and / or modify this data.
  29. In an E-R, Y is the dominant entity and X is a subordinate entity. Then which of the following is incorrect…
  30. The size of a data item is called its _______, which can be a field of some record or may be a larger…