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. Explain how the SPOOL command is used and what program it can be used in.






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






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






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






5. Explain why constraints are used when building tables.

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






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






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






9. Explain what is found in the All Objects report folder in SQL Developer






10. Write a statement for SQL*Plus that shows the dictionary.






11. __________________ inserts the current date and time.






12. A _________ subquery returns a single column with a single row






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






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






15. UNION ALL does not sort - therefore it is less time consuming to use than the...






16. SQL Developer provides an extensive list of useful reports and offers the capability to create your own...






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






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






19. You can use the ________________ to subtract months from a given date.






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






21. To join four tables - you must have at least _____ join conditions.






22. What is Oracle's most popular index storage structure?






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






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






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






26. When column names on the tables are different - you use the ______ condition.






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






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






29. The time zone displacement value indicates the time difference from _______.






30. The _____________ clause determines how rows are grouped.






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






32. When using the following data: NUMBER(10 -4) - the lowest number you can possibly have is __________.






33. A transaction is a...






34. Write a statement that drops the index need_to_pass_i






35. You use the __________ keyword to change characteristics of a column.






36. In SQL Developer field names and table names are shown in the color _______.






37. The ____________ keywords and the USING clause of the ANSI join syntax are mutually exclusive.






38. List the reasons that a subquery could not be unnested.






39. List the steps performed by a correlated subquery.






40. When you INSERT new information into a table - it is followed with a _______ keyword that contains the information that is going to be added to the table.






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






42. To equijoin a table with another table involves matching the...






43. An outer join includes the result rows returned by an __________ plus extra rows where no matches are found.






44. The ALTER SESSION statement can change the session's...






45. Converting a text literal to DATE format requires the use of the...






46. _________________ relationships are always optional relationships.






47. The ____________ icon allows you to execute multiple statements and emulates SQL *Plus as much as possible.






48. What is the syntax used to indicate that you are using the Oracle Outer Join operator?






49. What is the data type you can use if you need an unlimited number of textual characters?






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