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






2. A transaction is a...






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






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






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






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






7. List 6 Table-Related Menu Choices






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






9. The _______ operator determines common rows.






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






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






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






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






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






15. The COUNT function uses the __________ wildcard.






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






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






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






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






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






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






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






23. What is the first column of a composite index called?






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






25. List the different types of data dictionary views.






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






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






28. _________________ relationships are always optional relationships.






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






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






31. Write a statement that drops the index need_to_pass_i






32. A _____ is a query definition stored in the database that looks just like a table - but does not have any physical rows






33. 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?






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






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






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






37. Explain how Dynamic SQL is used and give an example of a Dynamic SQL statement.






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






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






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






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






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






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






44. PAGESIZE






45. 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.






46. Subqueries can return...






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






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






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






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







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