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






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






3. _________________ relationships are always optional relationships.






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






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






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






7. Dynamic views begin with a ___________.






8. 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.






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






10. The Nonequijoin can use the ________________ operator to construct joins that are not based on equality of values.






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






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






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






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






15. __________________ inserts the current date and time.






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






17. 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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18. To revert back to a state that happened before you ran your change statement - you issue a ____________ command.






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






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






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






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






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






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






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






26. What does SQL stand for?






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






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






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






30. When using the data NUMBER(10 -4) there will be _______ digits following the decimal point.






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






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






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






34. The ______ operator compares a list of values for equivalency






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






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






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






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






39. The COUNT function uses the __________ wildcard.






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






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






42. The ____________ command makes changes permanent.






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






44. When you create a report in SQL Developer all the column names must match identically the names of the columns found in the tables you are referencing.






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






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






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






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






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






50. SELECT * FROM instructor ORDER BY phone