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






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






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






4. Multiple SQL statements must be separated by semicolons.






5. Database software (an application)






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






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






8. A structured list of data of a specific type






9. _______ column name FROM table name






10. Descending






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






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






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






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






15. A record in a table






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






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






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






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






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






21. Simplest type of subquery.






22. Alias






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






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






25. A popular open source database






26. A language designed specifically for communicating with databases.






27. SQL statements are case- insensitive






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






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






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






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






32. 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.






33. Allows you to delete selected rows.






34. NOT - AND - OR






35. Used to nest subqueries within another subquery.






36. Primary way to do a query in SQL






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






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






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






40. Ascending






41. 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.






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






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






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






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






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






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






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






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






50. SQL is a language NOT an _______