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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. Alias
ORDER BY
mysql
Column
AS

2. All extra whitespace within a SQL statement is is ignored when that statement is processed.
Comparison Operators
Use of Whitespace
Database
DISTINCT

3. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
MIN()
Breaking up data
varchar(size)
SELECT

4. Allows a comparison with multiple values from a list.
mysql
Database
IN
SQL (Structured Query Language)

5. _______ column name FROM table name
Self-Join
Row
SELECT
Database

6. A single field in a table. All tables are made up of one or more columns.
UPDATE
Column
Database
DELETE

7. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
AVG()
MAX()
SELECT *
Primary Key

8. SQL statements are case- insensitive
SQL Statement and Case
INSERT INTO
MAX()
Commas

9. A structured list of data of a specific type
Nested Subquery
char(size)
Table
Commas

10. A language designed specifically for communicating with databases.
Comparison Operators
DESC
SQL (Structured Query Language)
DISTINCT

11. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
AS
DBMS - Database Management System
GROUP BY
Aggregate Functions

12. Used to nest subqueries within another subquery.
Nested Subquery
GROUP BY
Datatype
Breaking up data

13. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
Self-Join
Row
Primary Key
Commas

14. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
Nested Subquery
LIKE
MAX()
Terminating Statements

15. Limits the rows that appear in the result to those matching a specified condition
WHERE
DBMS - Database Management System
Logical Operators
Breaking up data

16. Multiple SQL statements must be separated by semicolons.
ANY
AS
Terminating Statements
FROM

17. The container - usually a file or set of files - to store organized data
char(size)
Database
HAVING
ORDER BY

18. NOT - AND - OR
SELECT *
Logical Operators
IN
Table

19. Primary way to do a query in SQL
SELECT Statement
Use of Whitespace
Primary Key
UPDATE

20. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
varchar(size)
SELECT *
MIN()
AS

21. Used to select all the information in a specified column.
SELECT
SELECT *
ORDER BY
mysql

22. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
SELECT *
Commas
MIN()
SUM()

23. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Row
Commas
Comparison Operators
HAVING

24. 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.
DISTINCT
SUM()
Always define Primary Keys
SELECT *

25. COUNT() - MAX() - MIN() - SUM() and AVG()
Always define Primary Keys
DESC
Aggregate Functions
Commas

26. Denotes that the search condition is TRUE for at least one element that the subquery returns.
SUM()
DELETE
ANY
Datatype

27. Specifies the tables or views from which rows and columns are retrieved
Primary Key
FROM
Use of Whitespace
INSERT INTO

28. Ascending
Comparison Operators
char(size)
Aggregate Functions
ASC

29. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Commas
COUNT()
Table
SQL extensions

30. Specify one or more columns on which to order the display.
application
Comparison Operators
Logical Operators
ORDER BY

31. Allows you to delete selected rows.
Always define Primary Keys
AVG()
WHERE
DELETE

32. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
DELETE
SQL extensions
ANY
char(size)

33. Limits the output of the established groups into the derived result group.
Terminating Statements
Nested Subquery
HAVING
INSERT INTO

34. Simplest type of subquery.
Simple Subquery
Self-Join
ASC
DISTINCT

35. Database software (an application)
Comparison Operators
DBMS - Database Management System
WHERE
Database

36. A popular open source database
DESC
mysql
WHERE
SQL (Structured Query Language)

37. SQL is a language NOT an _______
Commas
application
Column
ASC

38. Descending
Use of Whitespace
DESC
Comparison Operators
Logical Operators

39. 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.
application
AVG()
SUM()
GROUP BY

40. A column or set of columns whose values uniquely identify every row in a table.
Keyword
SUM()
Use of Whitespace
Primary Key

41. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
Keyword
FROM
Database
Terminating Statements

42. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
char(size)
COUNT()
Simple Subquery
Terminating Statements

43. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
Commas
Simple Subquery
Self-Join
Datatype

44. Method used to copy multiple records at one time using a SELECT statement
INSERT INTO
Column
Primary Key
IN

45. Provides a numerical tally of how many rows meet a specific set of criteria.
DISTINCT
Datatype
COUNT()
AS

46. Lets you change the values in one or more selected rows of a table.
GROUP BY
DELETE
MAX()
UPDATE

47. A record in a table
Row
DBMS - Database Management System
LIKE
MAX()

48. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
Self-Join
Commas
SELECT *
DISTINCT

49. Variable-length character string. Max size is specified in parenthesis.
varchar(size)
SELECT
SQL extensions
Self-Join

50. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
Database
AS
DISTINCT
number(size -d)