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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. LINESIZE






2. When you have issued a DELETE command - you can still ________ those rows and restore the information.






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






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






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






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






7. It is considered good form to put all SQL commands in...






8. You use the _________ keyword to add columns or constraints to a table.






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






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






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






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






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






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






15. The _____________ clause determines how rows are grouped.






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






17. Explain how Dynamic SQL is used and give an example of a Dynamic SQL statement.






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






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






20. Explain what a static data dictionary view is and how it is used






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






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






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






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






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






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






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






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






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






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






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






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






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






34. When disabling a unique or primary key - you can keep the index if you specify the __________________ clause in the ALTER TABLE statement.






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






36. List 4 aggregate functions






37. The ________________ is a type of statement whereby you retrieve data that exists in one table - but not in another.






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






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






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






41. SELECT * FROM instructor ORDER BY phone






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






43. When you run a script in SQL*Plus you must give the...






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






45. Dynamic views begin with a ___________.






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






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






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






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






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







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