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






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






3. An instruction by a user that directs a database to perform a certain way






4. Two tables are union compatible if they have the same number of fields and if their corresponding fields have identical data types






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






6. 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






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






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






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






10. The individual who is responsible for a database or the head of database administration






11. 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






12. The SQL clause that is used in a CREATE TABLE or ALTER TABLE command to set a table's primary key field(s)






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






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






15. The column on which two tables are joined






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






17. 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






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






19. The plural of Criterion






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






21. 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






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






23. The process of arranging rows in a table or results of a query in a particular order






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






25. The rule that no column (attribute) that is part of the primary key may accept null values






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






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






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






29. An index built on a single field






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






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






32. The most common form of a join






33. An association between entities






34. 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






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






36. A word that is part of the SQL language






37. The SQL statement that is used to revoke privileges from users of a database






38. The prevention of unauthorized access to a database






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






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






41. A structure that satisfies the properties required to be a relation with the exception of allowing repeating groups






42. 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.






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






44. The SQL command used to describe the layout of a table. The word table is followed by the name of the table to be created and then by the names and data types of the column (fields) that comprise the table






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






46. A screen object you use to maintain or view and print data from a database






47. An action that automatically occurs in response to an associated database operation such as INSERT or UPDATE or DELETE






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






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






50. 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