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






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






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






4. UNION ALL does not sort - therefore it is less time consuming to use than the...






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






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






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






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






9. When returning multiple rows - a subquery must contain the _____ - _____ - _____ - or ______ operator - otherwise Oracle will return an error






10. The TRUNC function on a date without a format model truncates the timestamp to...






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






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






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






14. The _______ operator determines common rows.






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






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






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






18. Explain why constraints are used when building tables.

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






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






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






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






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






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






25. PAGESIZE






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






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






28. NUMBER functions can be...






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






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






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






32. Subqueries can return...






33. 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.






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






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






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

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






38. How many characters can be stored in the CHAR column/field?






39. The query retrieves more than 5 to 15 percent of the rows






40. The ____________ command makes changes permanent.






41. 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.






42. What is the maximum value for a column defined as NUMBER(4 -2)?






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






44. List the steps performed by a correlated subquery.






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






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






47. List 4 aggregate functions






48. _________________ relationships are always optional relationships.






49. Write a solution that adds 20 minutes to a given date.






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