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SQL: Structured Query Language

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. Descending






2. Limits the output of the established groups into the derived result group.






3. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.






4. A column or set of columns whose values uniquely identify every row in a table.






5. Specify one or more columns on which to order the display.






6. A type of allowed data. Every table column has a datatype that restricts specific data in that column.






7. SQL is a language NOT an _______






8. Primary way to do a query in SQL






9. Specifies the tables or views from which rows and columns are retrieved






10. Allows you to delete selected rows.






11. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.






12. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.






13. A structured list of data of a specific type






14. All extra whitespace within a SQL statement is is ignored when that statement is processed.






15. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.






16. A single field in a table. All tables are made up of one or more columns.






17. Multiple SQL statements must be separated by semicolons.






18. Lets you change the values in one or more selected rows of a table.






19. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.






20. Although primary keys are not specifically required - most database designers make certain that every table they create has a primary key so that future data manipulation is possible.






21. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.






22. A popular open source database






23. Allows a comparison with multiple values from a list.






24. Alias






25. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of






26. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result






27. Denotes that the search condition is TRUE for at least one element that the subquery returns.






28. A reserved word that is part of the SQL language. Never name a table or column using a keyword.






29. The container - usually a file or set of files - to store organized data






30. NOT - AND - OR






31. Variable-length character string. Max size is specified in parenthesis.






32. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.






33. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.






34. Database software (an application)






35. A language designed specifically for communicating with databases.






36. Provides a numerical tally of how many rows meet a specific set of criteria.






37. COUNT() - MAX() - MIN() - SUM() and AVG()






38. A record in a table






39. Used to nest subqueries within another subquery.






40. Limits the rows that appear in the result to those matching a specified condition






41. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.






42. _______ column name FROM table name






43. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.






44. Method used to copy multiple records at one time using a SELECT statement






45. Simplest type of subquery.






46. Ascending






47. Used to select all the information in a specified column.






48. Takes average of each of the numeric values in the column.Can only be used in conjuction with the DISTINCT keyword and only works on numeric columns.






49. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.






50. SQL statements are case- insensitive