FILL IN THE BLANKS
1. _______________ contains the structure of database.
2. ______________is a hierarchical database system.
3. ______________is used to specify database retrievals and updates.
4. Middle level managers use ___________ information.
5. __________ is an organized collection of facts.
6. The smallest piece of meaningful information in a file is called_______________.
7. _____________ is responsible for physical design and maintenance of database.
8. Hierarchical network and relational data models are___________data models.
9. Data on a last level of a database tree is called___________________
10. ___________ is a collection of entries where each entry corresponds to a data record.
11. In the relational data model the columns of a table are called_________________.
12. A_______________is a mechanism that provides abstraction for database application.
13. The _______ model is based on the mathematical concept of a relation.
14. A relationship is always established between_____________.
15. Relational tables show only______________ relationship.
16. The values for an attribute are drawn from a set of values known as___________.
17. Relational model of data management is based on______________.
18. In the relational database model, the columns of a table are called___________.
19. In a relational database_______________ are not allowed to have null values.
20. The primary key of a relation is a minimal_____________.
21. In a relational database a referential integrity constraint is specified with the help of____________________.
22. Data about data is normally termed as_______________.
23. The primary key index does not allow ________________ data in a field.
24. If an entity X is existence-dependent on entity Y, then X is said to be__________.
25. A ___________ user is the owner of an Oracle’s dictionary tables.
26. GRANT is a________________ command.
27. The command ROLLBACK TO SAVEPOINT is used to _______________rollback a transaction.
28. The list of tuples selected using the SQL SELECT FROM command may contain_______________entries.
29. Along with the GROUP BY clause, one can use the__________________clause to define a condition on the group of tuples associated with each value of the grouping attributes.
30. A view of the database that appears to an application program are known as_____________.