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 what is found in the All Objects report folder in SQL Developer






2. The TIMESTAMP WITH LOCAL TIME ZONE data type allows...






3. List 6 Table-Related Menu Choices






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






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






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






7. Write a statement that drops the index need_to_pass_i






8. What is the Oracle data dictionary called that contains a set of tables and views containing the data about the database?






9. The focus of the logical data model is _____________






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






11. _________________ relationships are always optional relationships.






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






13. The COUNT function is useful for determining whether a table has...






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






15. When disabling a unique or primary key - you can keep the index if you specify the __________________ clause in the ALTER TABLE statement.






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






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






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






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






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






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






22. What does SQL stand for?






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






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






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






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






27. Write the syntax to rename index just_two_more_weeks_i to finally_i






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






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






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






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






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






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






34. __________________ inserts the current date and time.






35. The _______ operator determines common rows.






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






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






38. Subqueries can return...






39. _________ rows are not allowed in the relational model.






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






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






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






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






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






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






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

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47. PAGESIZE






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






49. The COUNT function uses the __________ wildcard.






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