Test your basic knowledge |

Oracle SQL

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. Information that is returned after you run your statement are found in the __________ tab in SQL Developer.
Results
Export Data
Primary key/foreign key
TO_CHAR function

2. The DUAL table can be used for...
Optional
Structured Query Language
Testing functions
Parent table

3. It is considered good form to put all SQL commands in...
Dynamic SQL is used to be continuously updated by the background processes in the Oracle instance but never by the user.
Precision
All caps
Equijoin and correlated subquery

4. Queries that are found in parentheses are done first - just as in the order of operations when doing...
Any
Fractional seconds
Mathematical equations
Testing functions

5. You can use the ________________ to subtract months from a given date.
Primary key/foreign key
4
Optional
ADD_MONTHS function

6. Explain the steps needed to run a script in SQL Developer
Details
Asterisk
Scale
Load the file into the SQL Statement Box - by opening the location the file is stored and inserting it into the statement Box. Next you can press the F5 key.

7. What does SQL stand for?
All caps
Structured Query Language
Re-create
FALSE

8. Explain in detail the impact of INDEXES and how they are used by Oracle.
To achieve good performance for data retrieval and data manipulation statements Oracle uses indexes. In the same way you would use an index in the back of a book to quickly find information - Oracle uses indexes to speed up data retrieval. If the app
BETWEEN
Mathematical equations
Data

9. The COUNT function is useful for determining whether a table has...
GROUP BY
Data
Same
INTERSECT

10. __________________ inserts the current date and time.
VALUES clause of an INSERT statement
DROP INDEX need_to_pass_i
SYSDATE
**** Select a row from the outer query - Determine the value of the correlated column - Execute the inner query for each record of the outer query. - Feed the results of the inner query to the outer query and evaluate it. It if satisfies the criteria

11. What is the tab in SQL Developer where data dictionary view information can be found?
Details
F12
Equijoin and correlated subquery
Constraints are used to enforce the business rules of a system. For instance - 'The salary of an employee may not be a negative number' may be enforced with a check constraint on the salary column. Constraints also ensure integrity and data consisten

12. List the reasons that a subquery could not be unnested.
Logical unit of work
X
LIKE
Surrogate key

13. The key that most database designers prefer and is chosen by the system is the _____________ key.
Surrogate
MODIFY
LIKE
SELECT SYSDATE+1/96 - FROM dual

14. Explain how Substitution Variables are used when writing scripts.
F12
@ or START
When you want to run the same script repeatedly - but want to be able to change a variable you would use a substitution variable. During the execution of the script the user will be prompted to input the variable to use.
Has not changed the name

15. What does the following function return? SELECT LENGTH(NULL) - FROM dual
SUM
B-Tree Index
Null
X

16. Explicit data type conversion is preferable to Oracle's...
Re-create
Rounded edges
12:00:00 A.M
Implicit conversion

17. _________ rows are not allowed in the relational model.
NATURAL JOIN
Orphan
User-defined reports
SUM

18. Explain what is found in the All Objects report folder in SQL Developer
Lists all objects accessible for the chosen database connection. Also lists a helpful dependencies report for accessing change impact.
Re-create
RENAME - COPY - DROP - TRUNCATE - LOCK - & COMMENT
Running a script file

19. Users can only see changes made to a database once they have been...
Equijoin and identical column names
Committed
A correct statement
Business problems

20. SQL Developer provides an extensive list of useful reports and offers the capability to create your own...
Nested
User-defined reports
All
FALSE

21. The Nonequijoin can use the ________________ operator to construct joins that are not based on equality of values.
CLOB
BETWEEN
Self-joins
SELECT DISTINCT menu FROM restaurant

22. The ___________ operator tests whether a matching row cannot be found.
Subqueries allow you to nest multiple queries into each other. This gives you the ability to use one statement to break down a problem into individual components. Without nesting queries - you would be required to have multiple queries which could be
RENAME just_two_more_weeks TO finally_i
X
FALSE

23. Explain how Oracle treats locks when a database is being updated and needs to be viewed by other users.
Command returns the number of records returned by a query.
When you issue a INSERT - UPDATE - DELETE - or MERGE statement - Oracle automatically locks the modified rows. The lock prevents other sessions from making changes to these rows. The lock is released when the session initiating change commits or roll
B-Tree Index
To achieve good performance for data retrieval and data manipulation statements Oracle uses indexes. In the same way you would use an index in the back of a book to quickly find information - Oracle uses indexes to speed up data retrieval. If the app

24. You can simplify the writing of SQL statements by writing SQL _________ that generate and execute other SQL statements.
IN ANY ALL SOME
Script
Data
Primary key/foreign key

25. Which format mask displays December 31st - 1999?
Month ddth - yyyy
ALL_OBJECTS
Multiple rows
CLOB

26. How many characters can be stored in the CHAR column/field?
Command returns the number of records returned by a query.
Twice
2000
When you issue a INSERT - UPDATE - DELETE - or MERGE statement - Oracle automatically locks the modified rows. The lock prevents other sessions from making changes to these rows. The lock is released when the session initiating change commits or roll

27. What is the keyboard shortcut for the ROLLBACK command?
Combine
Equijoin and correlated subquery
F12
KEEP INDEX

28. Explain Flashback queries and how they are used. Give an example of a FLASHBACK_TRANSACTION query and explain what it does row by row.

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

29. What is the syntax used to indicate that you are using the Oracle Outer Join operator?
Crow's foot
+
Parent table
Any

30. In SQL Developer field names and table names are shown in the color _______.
F12
Black
Correlated
DROP INDEX need_to_pass_i

31. _________________ relationships are always optional relationships.
4
All
LENGTH
Recursive

32. The purpose of the HAVING clause is to eliminate___________.
Static or dynamic
A correct statement
Groups
V$

33. Which one of the following string functions tells you how many characters are in a string?
ANY
Leading-edge
LENGTH
Constraints are used to enforce the business rules of a system. For instance - 'The salary of an employee may not be a negative number' may be enforced with a check constraint on the salary column. Constraints also ensure integrity and data consisten

34. Oracle uses the outer join operator to indicate that nulls are shown for...
Actual column
Non-matching rows
Twice
+

35. The _____________ clause determines how rows are grouped.
RIGHT LEFT JOIN
USER_ - ALL_ - DBA_ - and V$
GROUP BY
Running a script file

36. SELECT * FROM instructor ORDER BY phone
V$
4
A correct statement
MODIFY

37. What is the main difference between the NOT EXISTS and the NOT IN operators?
4
All
The way NULL values are treated
Correlated

38. You can pass parameters from the operating system when ___________ in SQl*Plus
Hide data
Location of the file
Structured Query Language
Running a script file

39. The ____________ keywords and the USING clause of the ANSI join syntax are mutually exclusive.
NATURAL JOIN
Primary key/foreign key
Implicit conversion
Retrieve

40. The ROWID pseudocolumn is not an ________- but it acts like one.
+
Both MIN and MAX
Actual column
Orphan

41. To restart a sequence at a lower number - you can drop and ________ the sequence.
Re-create
Equijoin and correlated subquery
COMMIT
Groups

42. SQL Developer's ____________________ option allows you to selectively export certain rows and columns.
STORAGE
DICTIONARY
Export Data
DROP INDEX need_to_pass_i

43. Write an SQL statement for SQL *Plus in which you want any unique menu items to be displayed from the restaurant table
999999.9999
SELECT DISTINCT menu FROM restaurant
Equijoin
Details

44. The ________________ is a type of statement whereby you retrieve data that exists in one table - but not in another.
Parent table
MINUS
MODIFY
Scale

45. To join four tables - you must have at least _____ join conditions.
RUN SCRIPT
MINUS
Optional
Three

46. List 6 Table-Related Menu Choices
Data
Equijoin
ADD_MONTHS function
RENAME - COPY - DROP - TRUNCATE - LOCK - & COMMENT

47. An outer join includes the result rows returned by an __________ plus extra rows where no matches are found.
F12
Equijoin
LENGTH
ADD_MONTHS function

48. When returning multiple rows - a subquery must contain the _____ - _____ - _____ - or ______ operator - otherwise Oracle will return an error
IN ANY ALL SOME
Parent table
GROUP BY
COUNT(registration_date) - AVG (capacity) - MIN (capacity) - MAX (capacity)

49. 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.
Static or dynamic
4000
RIGHT LEFT JOIN
12:00:00 A.M

50. The data type definitions NUMBER(10) and NUMBER(10 -0) are the...
Same
ROLLBACK
Re-create
Scale

Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?

Major Subjects
Tests & Exams AP CLEP DSST GRE SAT GMAT	Certifications CISSP go to https://www.isc2.org/ PMP ITIL RHCE MCTS More...	IT Skills Android Programming Data Modeling Objective C Programming Basic Python Programming Adobe Illustrator More...	Business Skills Advertising Techniques Business Accounting Basics Business Strategy Human Resource Management Marketing Basics More...
Soft Skills Body Language People Skills Public Speaking Persuasion Job Hunting And Resumes More...	Vocabulary GRE Vocab SAT Vocab TOEFL Essential Vocab Basic English Words For All Global Words You Should Know Business English More...	Languages AP German Vocab AP Latin Vocab SAT Subject Test: French Italian Survival Norwegian Survival More...	Engineering Audio Engineering Computer Science Engineering Aerospace Engineering Chemical Engineering Structural Engineering More...
Health Sciences Basic Nursing Skills Health Science Language Fundamentals Veterinary Technology Medical Language Cardiology Clinical Surgery More...	English Grammar Fundamentals Literary And Rhetorical Vocab Elements Of Style Vocab Introduction To English Major Complete Advanced Sentences Literature Homonyms More...	Math Algebra Formulas Basic Arithmetic: Measurements Metric Conversions Geometric Properties Important Math Facts Number Sense Vocab Business Math More...	Other Major Subjects Science Economics History Law Performing-arts Cooking Logic & Reasoning Trivia

Test your basic knowledge |

Oracle SQL

Sorry!:) No result found.

Can you answer 50 questions in 15 minutes?

Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests

Major Subjects

Tests & Exams

Certifications

IT Skills

Business Skills

Soft Skills

Vocabulary

Languages

Engineering

Health Sciences

English

Math

Other Major Subjects

Browse all subjects

Browse all tests

Most popular tests