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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. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
Self-Join
LIKE
INSERT INTO
SUM()

2. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
LIKE
HAVING
Commas
SQL extensions

3. A structured list of data of a specific type
Primary Key
Table
IN
DISTINCT

4. A popular open source database
mysql
varchar(size)
IN
SQL (Structured Query Language)

5. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Commas
HAVING
Datatype
DELETE

6. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
mysql
DISTINCT
Datatype
number(size -d)

7. Specify one or more columns on which to order the display.
ORDER BY
SUM()
MAX()
Comparison Operators

8. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
Always define Primary Keys
ORDER BY
Nested Subquery
Breaking up data

9. Descending
DESC
char(size)
DELETE
SELECT *

10. Lets you change the values in one or more selected rows of a table.
DISTINCT
DESC
UPDATE
application

11. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
SELECT *
INSERT INTO
SQL extensions
Simple Subquery

12. A single field in a table. All tables are made up of one or more columns.
Comparison Operators
Column
LIKE
Primary Key

13. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
SELECT Statement
Use of Whitespace
char(size)
Commas

14. Ascending
ASC
LIKE
Database
AS

15. Database software (an application)
Terminating Statements
DBMS - Database Management System
IN
DELETE

16. Denotes that the search condition is TRUE for at least one element that the subquery returns.
DELETE
Nested Subquery
SQL Statement and Case
ANY

17. Limits the output of the established groups into the derived result group.
SELECT
Breaking up data
HAVING
Aggregate Functions

18. Provides a numerical tally of how many rows meet a specific set of criteria.
COUNT()
Comparison Operators
SQL (Structured Query Language)
number(size -d)

19. All extra whitespace within a SQL statement is is ignored when that statement is processed.
Comparison Operators
Use of Whitespace
mysql
AS

20. 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.
AVG()
Commas
char(size)
Use of Whitespace

21. Primary way to do a query in SQL
GROUP BY
SELECT Statement
application
SUM()

22. Used to nest subqueries within another subquery.
Self-Join
DELETE
COUNT()
Nested Subquery

23. Multiple SQL statements must be separated by semicolons.
Terminating Statements
HAVING
MIN()
char(size)

24. A column or set of columns whose values uniquely identify every row in a table.
Table
varchar(size)
Primary Key
DESC

25. A record in a table
Breaking up data
AVG()
Row
WHERE

26. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
Keyword
DISTINCT
Nested Subquery
Breaking up data

27. Allows a comparison with multiple values from a list.
UPDATE
COUNT()
SUM()
IN

28. Variable-length character string. Max size is specified in parenthesis.
SELECT *
Use of Whitespace
varchar(size)
Commas

29. The container - usually a file or set of files - to store organized data
MIN()
Database
UPDATE
char(size)

30. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
Self-Join
Aggregate Functions
DESC
LIKE

31. Specifies the tables or views from which rows and columns are retrieved
DELETE
FROM
IN
SQL (Structured Query Language)

32. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
GROUP BY
IN
FROM
SELECT Statement

33. Limits the rows that appear in the result to those matching a specified condition
application
Primary Key
Commas
WHERE

34. Used to select all the information in a specified column.
mysql
UPDATE
Logical Operators
SELECT *

35. _______ column name FROM table name
GROUP BY
SELECT
DELETE
Use of Whitespace

36. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Nested Subquery
Primary Key
SQL extensions
Comparison Operators

37. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
MAX()
Nested Subquery
Database
SELECT

38. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
number(size -d)
SELECT *
AVG()
SELECT

39. Simplest type of subquery.
Simple Subquery
GROUP BY
Nested Subquery
Always define Primary Keys

40. A language designed specifically for communicating with databases.
Terminating Statements
Always define Primary Keys
SQL (Structured Query Language)
DELETE

41. NOT - AND - OR
MIN()
AS
Logical Operators
mysql

42. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
mysql
MIN()
SQL extensions
Breaking up data

43. Method used to copy multiple records at one time using a SELECT statement
AVG()
GROUP BY
INSERT INTO
Nested Subquery

44. COUNT() - MAX() - MIN() - SUM() and AVG()
Aggregate Functions
SQL Statement and Case
ASC
Database

45. 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.
Table
ASC
Always define Primary Keys
INSERT INTO

46. Allows you to delete selected rows.
DELETE
Comparison Operators
Keyword
Breaking up data

47. SQL statements are case- insensitive
varchar(size)
Simple Subquery
Terminating Statements
SQL Statement and Case

48. Alias
SELECT *
Primary Key
ASC
AS

49. SQL is a language NOT an _______
SELECT
Primary Key
application
Simple Subquery

50. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
Keyword
UPDATE
Datatype
Breaking up data