Test your basic knowledge |

Database Fundamentals

Subject : it-skills
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. In relational algebra the operation in which two tables are connected on the basis of common data.






2. The SQL command that drops (deletes) and index from a table






3. An index built on a single field






4. A rule that must be followed by data in a database






5. The relational algebra command to select rows from a table






6. More than one entry at a single location in a table






7. When comparing tables an intersection is a new table containing all rows that are in both original tables






8. The part of an SQL SELECT command that indicates the columns to be included in the query results






9. The area of memory in MySQL that stores the most recently entered command






10. A file that relates key values to records that contain those key values






11. The property that lets you change the structure of a database without requiring you to change the programs that access the database






12. Duplication of data or the storing of the same data in more than one place.






13. A structure that can store information about multiple types of entities - the attributes of these entities and the relationships among those entities






14. The SQL command used to add new data to a table






15. A function used to calculate the number of entries and the sum or average of all the entries in a given column or the largest or smallest of the entries in a given column






16. The field or fields on which an index is built






17. More than one entry at a single location in a table






18. The relational algebra command to select rows from a table






19. The combination of two or more rows in an operation - such as a join - or the combination of two or more columns for a primary key field to uniquely identify a given row in a table






20. A function used to calculate the number of entries and the sum or average of all the entries in a given column or the largest or smallest of the entries in a given column






21. The part of an SQL SELECT command that indicates a sort order






22. The plural of Criterion






23. A database has integrity if the data in it satisfies all established integrity constraints






24. To indicate the table (relation) of which a given column (attribute) is a part by preceding the column name with the table name.






25. A graphic model for database design in which entities are represented as rectangles and relationships are represented as either arrows or diamonds connected to the entities they relate






26. A characteristic or property of an entity






27. A minimal collection of columns (attributes) in a table on which all columns are functionally dependent and that is chosen as the main direct-access vehicle to individual rows.






28. The property that lets you change the structure of a database without requiring you to change the programs that access the database






29. A query that deletes all records that satisfy some criterion






30. An update option in which related records are automatically updated






31. The portion of the system catalog that contains table information






32. A Characteristic or property of an entity






33. A relational data manipulation language in which new tables are created from existing tables through the use of a set of operations






34. The SQL command that creates an index in a table






35. A rule in Access that data entered in a field must satisfy






36. The relational algebra command for performing the difference of two tables






37. The individual or group that is responsible for a database






38. Two simple criteria in a query the are combined with the AND or OR operators






39. A message in Access that is displayed when a validation rule is violated






40. A structure that can store information about multiple types of entities - the attributes of these entities and the relationships among those entities






41. A field whose value is computed from other fields in the database






42. The SQL clause that is used to enforce legal-values integrity






43. A data value meaning "unknown" or "not applicable"






44. A field whose value is computed from other fields in the database






45. A rule that must be followed by data in a database






46. When sorting on two fields - the less important field






47. A structure that contains information about the objects (tables or columns or indexes or views and so on) in a database






48. A column (attribute) or collection of columns in a table whose value is required either to match the value of a primary key in a table or to be null






49. In an Access query the line drawn between tables to indicate how they are related






50. A database has integrity if the data in it satisfies all established integrity constraints