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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. 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.






2. Primary way to do a query in SQL






3. Ascending






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






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






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






7. A record in a table






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






9. Allows you to delete selected rows.






10. Simplest type of subquery.






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






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






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






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






15. SQL is a language NOT an _______






16. Descending






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






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






19. NOT - AND - OR






20. Alias






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






22. Database software (an application)






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






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






25. SQL statements are case- insensitive






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






27. A popular open source database






28. A language designed specifically for communicating with databases.






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






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






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






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






33. 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.






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






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






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






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






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






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






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






41. Multiple SQL statements must be separated by semicolons.






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






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






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






45. _______ column name FROM table name






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






47. A structured list of data of a specific type






48. Used to nest subqueries within another subquery.






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






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