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






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






3. The COUNT function uses the __________ wildcard.






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






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






6. Which operator is most commonly used?






7. __________________ inserts the current date and time.






8. NUMBER functions can be...






9. Which one of the following string functions tells you how many characters are in a string?






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






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






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






13. Which format mask displays December 31st - 1999?






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






15. Write a statement that drops the index need_to_pass_i






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






17. The __________ operator is inclusive of the two values specified.






18. When column names on the tables are different - you use the ______ condition.






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






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






21. SELECT * FROM instructor ORDER BY phone






22. PAGESIZE






23. Subqueries can return...






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






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






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






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






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






29. _________________ relationships are always optional relationships.






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






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






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






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






34. A transaction is a...






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






36. 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.






37. Explain why constraints are used when building tables.

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






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






40. 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.






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






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






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






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






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






46. 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.






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






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






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






50. What is the most common DATE format found in SQL?







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