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






2. Dynamic views begin with a ___________.






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






4. Write a solution that adds 20 minutes to a given date.






5. Explain how you can optimize your queries with subqueries and the main advantage of doing so.






6. How many characters can you have using the VARCHAR data type?






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






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






9. List the different types of data dictionary views.






10. You can __________ DISTINCT and a GROUP BY clause in the same SELECT statement.






11. Which operator is most commonly used?






12. Write the syntax to rename index just_two_more_weeks_i to finally_i






13. The _______ operator determines common rows.






14. To restart a sequence at a lower number - you can drop and ________ the sequence.






15. The query retrieves more than 5 to 15 percent of the rows






16. The ROWID pseudocolumn is not an ________- but it acts like one.






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






18. Write an SQL statement for SQL *Plus in which you want any unique menu items to be displayed from the restaurant table






19. You can pass parameters from the operating system when ___________ in SQl*Plus






20. What is the name of the view where you can find the collection of static and data dictionary tables and views - along with their descriptions?






21. Which one of the following string functions tells you how many characters are in a string?






22. The _____________ clause determines how rows are grouped.






23. LINESIZE






24. The DUAL table can be used for...






25. What is the main difference between the NOT EXISTS and the NOT IN operators?






26. Subqueries can return...






27. List 4 aggregate functions






28. The ________________ is a type of statement whereby you retrieve data that exists in one table - but not in another.






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






30. To place a line comment in your SQL statements - you first place a // at the beginning of the line.






31. The RTRIM function is useful for eliminating ________ in a string.






32. The key that most database designers prefer and is chosen by the system is the _____________ key.






33. ___________ subqueries allow you to reference columns from the outer query and execute the inner query repeatedly






34. The __________ operator is inclusive of the two values specified.






35. The ______ operator compares a list of values for equivalency






36. When using the data NUMBER(10 -4) there will be _______ digits following the decimal point.






37. The ____________ clause on a CREATE TABLE statement can specify how much space to allocate.






38. Explain how Substitution Variables are used when writing scripts.






39. What is the tab in SQL Developer where data dictionary view information can be found?






40. The COUNT function uses the __________ wildcard.






41. The _______ function lets you perform if-then-else functionality with the SQL language.






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






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






44. Explain Flashback queries and how they are used. Give an example of a FLASHBACK_TRANSACTION query and explain what it does row by row.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


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






46. Oracle uses the outer join operator to indicate that nulls are shown for...






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






48. The NEXTVAL and CURRVAL pseudocolumns can be used in which of the following SQL constructs? Select all that apply.






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






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







Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?


Let me suggest you:



Major Subjects



Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Most popular tests