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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. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
SQL Statement and Case
UPDATE
char(size)
SQL (Structured Query Language)

2. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
MIN()
MAX()
AVG()
Self-Join

3. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
DESC
Row
Use of Whitespace
Breaking up data

4. SQL statements are case- insensitive
DELETE
LIKE
SQL Statement and Case
INSERT INTO

5. Specify one or more columns on which to order the display.
ORDER BY
application
Table
Primary Key

6. NOT - AND - OR
char(size)
SELECT *
Logical Operators
Keyword

7. Denotes that the search condition is TRUE for at least one element that the subquery returns.
SUM()
Commas
ANY
AVG()

8. Primary way to do a query in SQL
Aggregate Functions
MIN()
Logical Operators
SELECT Statement

9. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
Self-Join
ORDER BY
Breaking up data
SQL (Structured Query Language)

10. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
SQL extensions
MAX()
INSERT INTO
Keyword

11. Multiple SQL statements must be separated by semicolons.
HAVING
COUNT()
DELETE
Terminating Statements

12. A single field in a table. All tables are made up of one or more columns.
MAX()
Column
number(size -d)
mysql

13. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
Always define Primary Keys
LIKE
UPDATE
Datatype

14. Allows a comparison with multiple values from a list.
mysql
IN
INSERT INTO
Column

15. Specifies the tables or views from which rows and columns are retrieved
FROM
Aggregate Functions
AS
mysql

16. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
ANY
HAVING
INSERT INTO
SUM()

17. All extra whitespace within a SQL statement is is ignored when that statement is processed.
Datatype
AS
Database
Use of Whitespace

18. Limits the output of the established groups into the derived result group.
Terminating Statements
HAVING
char(size)
Row

19. A record in a table
LIKE
SELECT
Row
SQL Statement and Case

20. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
Logical Operators
INSERT INTO
number(size -d)
IN

21. SQL is a language NOT an _______
Simple Subquery
IN
SQL extensions
application

22. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
Datatype
DISTINCT
WHERE
LIKE

23. A structured list of data of a specific type
number(size -d)
SELECT *
Table
Datatype

24. Provides a numerical tally of how many rows meet a specific set of criteria.
COUNT()
AS
Aggregate Functions
HAVING

25. 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.
ORDER BY
Table
Always define Primary Keys
char(size)

26. Descending
SELECT Statement
SQL extensions
DESC
AVG()

27. Ascending
Keyword
Aggregate Functions
ASC
SELECT Statement

28. 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()
SQL extensions
Nested Subquery
number(size -d)

29. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Primary Key
Keyword
GROUP BY
Comparison Operators

30. Lets you change the values in one or more selected rows of a table.
HAVING
SQL (Structured Query Language)
UPDATE
ASC

31. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Primary Key
Commas
AS
Table

32. Alias
Datatype
char(size)
SELECT *
AS

33. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
MIN()
SQL extensions
Column
AS

34. Database software (an application)
Primary Key
DISTINCT
DBMS - Database Management System
SQL (Structured Query Language)

35. Variable-length character string. Max size is specified in parenthesis.
varchar(size)
mysql
FROM
char(size)

36. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
DELETE
FROM
Table
SQL extensions

37. A language designed specifically for communicating with databases.
SELECT
SQL (Structured Query Language)
MIN()
GROUP BY

38. Method used to copy multiple records at one time using a SELECT statement
AVG()
UPDATE
INSERT INTO
ANY

39. _______ column name FROM table name
Terminating Statements
SELECT
Comparison Operators
number(size -d)

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

41. Used to select all the information in a specified column.
SELECT *
COUNT()
Self-Join
ASC

42. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
GROUP BY
FROM
Use of Whitespace
SQL Statement and Case

43. Simplest type of subquery.
Primary Key
Simple Subquery
Database
DBMS - Database Management System

44. Used to nest subqueries within another subquery.
number(size -d)
Nested Subquery
ANY
SELECT *

45. A column or set of columns whose values uniquely identify every row in a table.
GROUP BY
Primary Key
MIN()
SQL (Structured Query Language)

46. Allows you to delete selected rows.
DELETE
Use of Whitespace
Simple Subquery
SQL Statement and Case

47. A popular open source database
SELECT
AS
ANY
mysql

48. Limits the rows that appear in the result to those matching a specified condition
MIN()
WHERE
Always define Primary Keys
UPDATE

49. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
Always define Primary Keys
UPDATE
DISTINCT
ASC

50. The container - usually a file or set of files - to store organized data
Database
Self-Join
Row
AVG()