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






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






3. SELECT * FROM instructor ORDER BY phone






4. The data type definitions NUMBER(10) and NUMBER(10 -0) are the...






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






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






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






8. 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?






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






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






11. __________________ inserts the current date and time.






12. A join across three tables can be expressed with the ________ join syntax.






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






14. The ____________ command makes changes permanent.






15. What is the name of the key automatically generated from a sequence?






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






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






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






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






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






21. Subqueries can return...






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






23. A calculation with a null always yields...






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






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






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






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






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






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






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






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






32. You can simplify the writing of SQL statements by writing SQL _________ that generate and execute other SQL statements.






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






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






35. Comparison operators can compare multiple _________________.






36. The _______ operator determines common rows.






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






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






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






40. Another name for a data dictionary view is __________________ or _________________.






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






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






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






44. If a graphical representation of a table's box has __________ it means that the relationship is identifying.






45. The focus of the logical data model is _____________






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






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






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






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






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






Can you answer 50 questions in 15 minutes?



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