Test your basic knowledge |

Oracle SQL

Subjects : oracle, 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. What is Oracle's most popular index storage structure?






2. To revert back to a state that happened before you ran your change statement - you issue a ____________ command.






3. Users can only see changes made to a database once they have been...






4. What does the following function return? SELECT LENGTH(NULL) - FROM dual






5. ____________ are useful for analyzing and exploring the relationships within your data






6. What is the most common DATE format found in SQL?






7. When you create a report in SQL Developer all the column names must match identically the names of the columns found in the tables you are referencing.






8. In a view you can give a column a different name than it has in the...






9. Write a statement that drops the index need_to_pass_i






10. Explain the differences in how an ANSI Full Outer Join and a Full Outer Join using the UNION Operator work






11. FEEDBACK






12. The data type definitions NUMBER(10) and NUMBER(10 -0) are the...






13. A transaction is a...






14. The ____________ command makes changes permanent.






15. Information that is returned after you run your statement are found in the __________ tab in SQL Developer.






16. _________ and __________ functions are opposites of each other and provide a value in a group of rows.






17. The _______ operator determines common rows.






18. What is the command you would type into SQL*Plus if you needed to know the definition for each column of a table?






19. Subqueries can return...






20. What is the maximum value for a column defined as NUMBER(4 -2)?






21. Match each of the SQL commands on the left with a verb from the list.






22. Checks whether any value in the list makes the condition true.






23. The using clause of the ANSI join syntax always assumes an...






24. It is considered good form to put all SQL commands in...






25. What do views do that makes them so useful for security?






26. Instead of using the Oracle Outer Join Operator or the ANSI syntax - you can achieve the same result with two SQL statements: ____________ and a ____________






27. Joins involving multiple columns must always follow the ____________ relationship path.






28. The ________ operator cannot compare against a list of values.






29. PAGESIZE






30. SQL Developer's ____________________ option allows you to selectively export certain rows and columns.






31. The ______ depicts the M of a 1:M relationship.

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32. When returning multiple rows - a subquery must contain the _____ - _____ - _____ - or ______ operator - otherwise Oracle will return an error






33. What is the keyboard shortcut for the ROLLBACK command?






34. When you have issued a DELETE command - you can still ________ those rows and restore the information.






35. The ___________ operator tests whether a matching row cannot be found.






36. When you run a script in SQL*Plus you must give the...






37. Returns rows if the condition is true for all the values in the list






38. When using the following data: NUMBER(10 -4) - the # 4 is called the __________.






39. Explicit data type conversion is preferable to Oracle's...






40. How many characters can be stored in the CHAR column/field?






41. When using the following data: NUMBER(10 -4) - the # 10 is called the __________.






42. You can simplify the writing of SQL statements by writing SQL _________ that generate and execute other SQL statements.






43. A join across three tables can be expressed with the ________ join syntax.






44. Explain how Oracle treats locks when a database is being updated and needs to be viewed by other users.






45. What does SQL stand for?






46. When you want to run a script in either SQL*Plus or SQL Developer - you can use a ______ or the _________ command.






47. The purpose of the HAVING clause is to eliminate___________.






48. List the different types of data dictionary views.






49. When writing the syntax for finding information on three or more tables - the parenthesis around the ON clause is...






50. SQL*Plus is used more than SQL Developer when you need to...