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SQL: Structured Query Language

Subject : 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. Limits the output of the established groups into the derived result group.
LIKE
ORDER BY
SQL Statement and Case
HAVING

2. Specifies the tables or views from which rows and columns are retrieved
MAX()
FROM
Keyword
number(size -d)

3. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
Logical Operators
DESC
SQL (Structured Query Language)
DISTINCT

4. Descending
SUM()
DISTINCT
SQL (Structured Query Language)
DESC

5. Used to nest subqueries within another subquery.
Simple Subquery
SUM()
Nested Subquery
Logical Operators

6. A record in a table
DBMS - Database Management System
Row
Column
MIN()

7. Specify one or more columns on which to order the display.
ORDER BY
IN
SQL Statement and Case
DISTINCT

8. Although primary keys are not specifically required - most database designers make certain that every table they create has a primary key so that future data manipulation is possible.
Always define Primary Keys
DESC
ANY
INSERT INTO

9. NOT - AND - OR
Simple Subquery
Logical Operators
application
Comparison Operators

10. Method used to copy multiple records at one time using a SELECT statement
INSERT INTO
COUNT()
Primary Key
DISTINCT

11. Takes average of each of the numeric values in the column.Can only be used in conjuction with the DISTINCT keyword and only works on numeric columns.
GROUP BY
AVG()
Simple Subquery
AS

12. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
MAX()
mysql
Primary Key
SUM()

13. A structured list of data of a specific type
Table
LIKE
ANY
IN

14. All extra whitespace within a SQL statement is is ignored when that statement is processed.
Use of Whitespace
Table
SELECT
DELETE

15. Allows a comparison with multiple values from a list.
COUNT()
SELECT Statement
DELETE
IN

16. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
LIKE
Datatype
GROUP BY
Self-Join

17. Lets you change the values in one or more selected rows of a table.
SUM()
Keyword
Commas
UPDATE

18. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Comparison Operators
INSERT INTO
DBMS - Database Management System
Nested Subquery

19. Primary way to do a query in SQL
mysql
SELECT Statement
COUNT()
Row

20. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
char(size)
Always define Primary Keys
SELECT *
Breaking up data

21. A single field in a table. All tables are made up of one or more columns.
Terminating Statements
UPDATE
Column
mysql

22. _______ column name FROM table name
SELECT
Keyword
Self-Join
DELETE

23. SQL statements are case- insensitive
ANY
Primary Key
UPDATE
SQL Statement and Case

24. Database software (an application)
DBMS - Database Management System
IN
DISTINCT
DESC

25. A popular open source database
Aggregate Functions
mysql
Self-Join
DELETE

26. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
Keyword
SELECT
number(size -d)
varchar(size)

27. Simplest type of subquery.
Comparison Operators
Breaking up data
Simple Subquery
LIKE

28. Denotes that the search condition is TRUE for at least one element that the subquery returns.
UPDATE
ANY
Row
SELECT

29. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
Keyword
MIN()
number(size -d)
MAX()

30. A language designed specifically for communicating with databases.
SQL (Structured Query Language)
SUM()
Commas
HAVING

31. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
Nested Subquery
Primary Key
SELECT
LIKE

32. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
DELETE
Primary Key
FROM
MIN()

33. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
MIN()
Self-Join
Terminating Statements
Table

34. Ascending
char(size)
IN
Always define Primary Keys
ASC

35. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
Datatype
DELETE
Row
MIN()

36. A column or set of columns whose values uniquely identify every row in a table.
Primary Key
SELECT Statement
Table
SQL Statement and Case

37. Multiple SQL statements must be separated by semicolons.
UPDATE
DBMS - Database Management System
SELECT Statement
Terminating Statements

38. Variable-length character string. Max size is specified in parenthesis.
varchar(size)
Nested Subquery
ORDER BY
LIKE

39. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
UPDATE
Nested Subquery
Primary Key
SQL extensions

40. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
COUNT()
Breaking up data
MAX()
Table

41. Provides a numerical tally of how many rows meet a specific set of criteria.
mysql
Database
IN
COUNT()

42. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
SQL (Structured Query Language)
Commas
Simple Subquery
char(size)

43. Allows you to delete selected rows.
DELETE
SUM()
Row
Table

44. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
Primary Key
SUM()
SQL (Structured Query Language)
ANY

45. Limits the rows that appear in the result to those matching a specified condition
Column
WHERE
DESC
Self-Join

46. SQL is a language NOT an _______
application
HAVING
SQL Statement and Case
IN

47. The container - usually a file or set of files - to store organized data
LIKE
Database
char(size)
number(size -d)

48. COUNT() - MAX() - MIN() - SUM() and AVG()
AVG()
Aggregate Functions
SUM()
application

49. Alias
AS
application
Column
Keyword

50. Used to select all the information in a specified column.
SELECT *
UPDATE
Commas
DBMS - Database Management System