If an entity can belong to only one lower level entity then the constraint is

A. disjoint

B. partial

C. overlapping

D. single

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

You can do it
  1. Union operator is a :
  2. As per equivalence rules for query transformation, selection operation distributes over
  3. Whenever two independent one-to-many relationships are mixed in the same relation, a __________ arises.
  4. Which of the following constitutes a basic set of operations for manipulating relational data?
  5. The graphical representation of a query is .
  6. The drawback of shadow paging technique are
  7. ____ table store information about database or about the system.
  8. A _____ is a logical unit of database processing that includes one or more data access operations that…
  9. Which of the following ensures the atomicity of the transaction?
  10. Relational Algebra does not have
  11. In b-tree the number of keys in each node is than the number of its children.
  12. Which normal form is considered adequate for normal relational database design?
  13. The relational model is based on the concept that data is organized and stored in two-dimensional tables…
  14. Wait-for graph is used for
  15. In E-R Diagram total participation is represented by
  16. _____is a full form of SQL.
  17. For correct behaviour during recovery, undo and redo operation must be
  18. SQL server stores index information in the _____system table
  19. If the closure of an attribute set is the entire relation then the attribute set is a
  20. Processed data is called _____
  21. ______is a preferred method for enforcing data integrity
  22. An advantage of the database management approach is
  23. The default level of consistency in SQL is
  24. _____ First proposed the process of normalization.
  25. Create a table with the following attributes: Employee(EMPNO integer, EMPNAME of 10 characters)
  26. What are the desirable properties of a decomposition
  27. Change Staff table by removing default of Assistant for position column
  28. Between DRAM and magnetic disk storage another form of memory, called ______ memory is becoming common…
  29. The concept of mapping of ______ entity types is the concept in which the for each strong entity type…
  30. Which one is correct statement?Logical data independence provides following without changing application…