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






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






3. __________________ inserts the current date and time.






4. SELECT LIST of a subquery in an INSERT statement






5. NUMBER functions can be...






6. Explain in detail the impact of INDEXES and how they are used by Oracle.






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






8. Explain the steps needed to run a script in SQL Developer






9. What are the main components of a ROWID?






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






11. Dynamic views begin with a ___________.






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






13. The term ____________ ___________ is used to express a join that satisfies the join condition.






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






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






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






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






18. The _______ function adds values together for a group of rows.






19. Self-joins are useful for performing comparisons and checking for ___________ in data.






20. Queries that are found in parentheses are done first - just as in the order of operations when doing...






21. FEEDBACK






22. What does SQL stand for?






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






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






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






26. The _______ operator determines common rows.






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






28. It is always good practice to include the old values in the WHERE clause of UPDATE to ensure that another session or user _________________ in the meantime.






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






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






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






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






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






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






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






36. When is it not a good idea to use an index?






37. The same function can be used ______ in a SELECT statement.






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






39. All SQL statements contained within a script must end with a _______________ - even if they are done in SQL Developer.






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






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






42. SELECT * FROM instructor ORDER BY phone






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






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.

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






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






47. When writing an ANSI outer join - the keywords _________ OUTER and _________ OUTER are added to the __________ keyword to indicate the rows from which table to use.






48. 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.






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






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