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






2. What are the main components of a ROWID?






3. PAGESIZE






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






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






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






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






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






9. 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.






10. Write a statement that drops the index need_to_pass_i






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






12. The ____________ command makes changes permanent.






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






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






15. 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.






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






17. Comparison operators can compare multiple _________________.






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






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






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






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






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






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






24. Subqueries can return...






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






26. The _______ operator determines common rows.






27. List 6 Table-Related Menu Choices






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






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






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






31. A transaction is a...






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






33. A _________ subquery returns a single column with a single row






34. The ____________ clause on a CREATE TABLE statement can specify how much space to allocate.






35. List 4 aggregate functions






36. Which operator is most commonly used?






37. List the steps performed by a correlated subquery.






38. It is always good practice to include the old values in the WHERE clause of UPDATE to ensure that another session or user _________________ in the meantime.






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






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






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






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






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






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






45. FEEDBACK






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






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






48. To equijoin a table with another table involves matching the...






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






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