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. The SQL command that drops (deletes) a table from a database






2. A person or place or object or event or idea for which you want to store and process data






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






4. The most common form of a join






5. A file used to store data about a single entity. Such a file can be thought of as a table.






6. The prevention of unauthorized access to a database






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






8. In relational algebra the operation in which two tables are connected on the basis of common data.






9. An index built on a single field






10. A program or a collection of programs through which users interact with a database






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






12. A person or place or object or event or idea for which you want to store and process data






13. The most common form of a join






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






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






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






17. What type of an operator is >= ?






18. The process of creating collections of records that share some common characteristics






19. The rule that if table A contains a foreign key that matches the primary key of table B then the value of this foreign key must either match the value of the primary key for some row in table B or be null






20. When sorting on two fields this is the more important field






21. The prevention of unauthorized access to a database






22. 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






23. The part of an SQL SELECT command that indicates the condition rows must satisfy to be displayed in the query results






24. A relationship between two entities in which each occurrence of the first entity is related to many occurrences of the second entity and each occurrence of the second entity is related to or at most one occurrence of the first entity






25. The plural of Criterion






26. A two-dimensional table-style collection of data in which all entries are single-valued - each column has a distinct name and all the values in a column are values of the attribute that is identified by the column name - and the order of the columns






27. The field on which data are sorted






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






29. 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.






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






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






32. A delete option in which related records are automatically deleted






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






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






35. A Characteristic or property of an entity






36. The process of determining the content and structure of data in a database in order to support some activity on behalf of a user or group of users






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






38. The query that is used to define the structure of a viewk






39. A source of data - usually stored in hidden database tables - about the types of entities or attributes and relationships in a database






40. A statement the can be either true or false. Also called a condition






41. The column on which two tables are joined






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






43. The part of an SQL SELECT command that indicates grouping






44. An access query that creates a table using the results of a query






45. A combination of criteria in which at least on the criteria must be true






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






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






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






49. 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






50. Combination of criteria in which both criteria must be true