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. LINESIZE
Command determines the total number of characters SQL *Plus displays in on line before beginning a new line.
Multiple rows
IN ANY ALL SOME
UTC

2. When you have issued a DELETE command - you can still ________ those rows and restore the information.
Retrieve
SYSDATE
Time zone
BETWEEN

3. To restart a sequence at a lower number - you can drop and ________ the sequence.
Command returns the number of records returned by a query.
Re-create
Business problems
IN ANY ALL SOME

4. The _______ function adds values together for a group of rows.
STORAGE
SUM
RUN SCRIPT
Equijoin and correlated subquery

5. If a graphical representation of a table's box has __________ it means that the relationship is identifying.
Both MIN and MAX
When the table is small (unless your business rules require you too)
Rounded edges
Combine

6. The _______ function lets you perform if-then-else functionality with the SQL language.
Twice
DECODE
ANSI
DESC dict;

7. It is considered good form to put all SQL commands in...
FALSE
SET clause of an UPDATE statement
Equijoin and correlated subquery
All caps

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

9. What is the maximum value for a column defined as NUMBER(4 -2)?
12:00:00 A.M
X
99.99
Month ddth - yyyy

10. Explain what is found in the All Objects report folder in SQL Developer
Details
Lists all objects accessible for the chosen database connection. Also lists a helpful dependencies report for accessing change impact.
RIGHT LEFT JOIN
SUM

11. When using the following data: NUMBER(10 -4) - the # 10 is called the __________.
Data
Precision
The SPOOL command - together with a file name - spools any subsequently issued SQL Plus or SQL command to a file. Just as with other file names - you can add a path to store the file in a directory other than your SQL Plus default directory. SQL Deve
BETWEEN

12. The TIMESTAMP WITH LOCAL TIME ZONE data type allows...
Fractional seconds
Structured Query Language
DESC dict;
Orphan

13. You can __________ DISTINCT and a GROUP BY clause in the same SELECT statement.
Command determines the total number of characters SQL *Plus displays in on line before beginning a new line.
Combine
B-Tree Index
@ or START

14. What does the following function return? SELECT LENGTH(NULL) - FROM dual
Null
LIKE
Orphan
A correct statement

15. The _____________ clause determines how rows are grouped.
ANY
GROUP BY
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
SELECT DISTINCT menu FROM restaurant

16. The ____________ keywords and the USING clause of the ANSI join syntax are mutually exclusive.
IN ANY ALL SOME
NATURAL JOIN
X
Month ddth - yyyy

17. Explain how Dynamic SQL is used and give an example of a Dynamic SQL statement.
Three
+
Dynamic SQL is used to be continuously updated by the background processes in the Oracle instance but never by the user.
Asterisk

18. Queries that are found in parentheses are done first - just as in the order of operations when doing...
Mathematical equations
Parent table
COMMIT
Command returns the number of records returned by a query.

19. The COUNT function is useful for determining whether a table has...
SUM
X
Data
RENAME - COPY - DROP - TRUNCATE - LOCK - & COMMENT

20. Explain what a static data dictionary view is and how it is used
The static data dictionary stores details about database objects - such as tables - indexes - and views. Whenever a new object is added or an object is changed - data about the object is recorded in the data dictionary.
DICT_COLUMNS
Optional
V$

21. You can use the ________________ to subtract months from a given date.
FALSE
ADD_MONTHS function
Lists all objects accessible for the chosen database connection. Also lists a helpful dependencies report for accessing change impact.
DD-MON-YY

22. SQL Developer provides an extensive list of useful reports and offers the capability to create your own...
Primary key/foreign key
User-defined reports
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
Groups

23. Match each of the SQL commands on the left with a verb from the list.
UNION operator
Dynamic SQL is used to be continuously updated by the background processes in the Oracle instance but never by the user.
SELECT SYSDATE+1/96 - FROM dual
Control - Revoke - Define - TRUNCATE Manipulate - MERGE

24. The ______ operator compares a list of values for equivalency
ANY
Control - Revoke - Define - TRUNCATE Manipulate - MERGE
Three
99.99

25. The ________ operator cannot compare against a list of values.
Rounded edges
Leading-edge
LIKE
Asterisk

26. A _________ subquery returns a single column with a single row
B-Tree Index
Nested
Primary key/foreign key
Scalar

27. The key that most database designers prefer and is chosen by the system is the _____________ key.
Surrogate
Structured Query Language
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.
KEEP INDEX

28. The query retrieves more than 5 to 15 percent of the rows
Retrieve
The SPOOL command - together with a file name - spools any subsequently issued SQL Plus or SQL command to a file. Just as with other file names - you can add a path to store the file in a directory other than your SQL Plus default directory. SQL Deve
The indexed column is part of an expression. In this case - consider creating a function-based index instead
B-Tree Index

29. ___________ subqueries allow you to reference columns from the outer query and execute the inner query repeatedly
Mathematical equations
LIKE
Twice
Correlated

30. How many characters can be stored in the CHAR column/field?
VALUES
Scalar
All
2000

31. Write a statement for SQL*Plus that shows the dictionary.
DESC dict;
999999.9999
Non-matching rows
Run scripts

32. Write an SQL statement for SQL *Plus in which you want any unique menu items to be displayed from the restaurant table
Twice
DICTIONARY
SELECT DISTINCT menu FROM restaurant
Dynamic SQL is used to be continuously updated by the background processes in the Oracle instance but never by the user.

33. UNION ALL does not sort - therefore it is less time consuming to use than the...
Actual column
Results
UNION operator
VALUES

34. When disabling a unique or primary key - you can keep the index if you specify the __________________ clause in the ALTER TABLE statement.
Recursive
KEEP INDEX
INTERSECT
SELECT DISTINCT menu FROM restaurant

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

36. List 4 aggregate functions
RUN SCRIPT
COUNT(registration_date) - AVG (capacity) - MIN (capacity) - MAX (capacity)
999999.9999
SET clause of an UPDATE statement

37. The ________________ is a type of statement whereby you retrieve data that exists in one table - but not in another.
COMMIT
RENAME just_two_more_weeks TO finally_i
MINUS
Run scripts

38. Checks whether any value in the list makes the condition true.
The SPOOL command - together with a file name - spools any subsequently issued SQL Plus or SQL command to a file. Just as with other file names - you can add a path to store the file in a directory other than your SQL Plus default directory. SQL Deve
Any
Running a script file
12:00:00 A.M

39. The purpose of the HAVING clause is to eliminate___________.
Precision
Groups
SUM
STORAGE

40. The same function can be used ______ in a SELECT statement.
LENGTH
Surrogate key
Twice
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

41. SELECT * FROM instructor ORDER BY phone
Combine
A correct statement
The static data dictionary stores details about database objects - such as tables - indexes - and views. Whenever a new object is added or an object is changed - data about the object is recorded in the data dictionary.
Nested

42. The ____________ clause on a CREATE TABLE statement can specify how much space to allocate.
SUM
Script
INNER JOIN
STORAGE

43. When you run a script in SQL*Plus you must give the...
ANSI
Location of the file
USER_ - ALL_ - DBA_ - and V$
Export Data

44. Another name for a data dictionary view is __________________ or _________________.
**** 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
Static or dynamic
Equijoin and identical column names
GROUP BY

45. Dynamic views begin with a ___________.
Retrieve
GROUP BY
V$
Mathematical equations

46. Explain in detail the impact of INDEXES and how they are used by Oracle.
The SPOOL command - together with a file name - spools any subsequently issued SQL Plus or SQL command to a file. Just as with other file names - you can add a path to store the file in a directory other than your SQL Plus default directory. SQL Deve
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
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
Orable's flashback query feature allows you to look at values of a query at a specific time in the past - such as before specfic DML statements occured. This can be usefull in case a suer accidentally performs an unintended but committed DML change.

47. The ROWID pseudocolumn is not an ________- but it acts like one.
FALSE
Any
Actual column
Testing functions

48. SQL*Plus is used more than SQL Developer when you need to...
Semicolon or forward slash
Run scripts
Equijoin and correlated subquery
Both MIN and MAX

49. A calculation with a null always yields...
Another null
Optional
DESC dict;
LENGTH

50. When using the following data: NUMBER(10 -4) - the lowest number you can possibly have is __________.
Both MIN and MAX
Surrogate
999999.9999
Parent table

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