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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. All extra whitespace within a SQL statement is is ignored when that statement is processed.
SELECT Statement
Use of Whitespace
Keyword
MIN()

2. Lets you change the values in one or more selected rows of a table.
Primary Key
varchar(size)
UPDATE
Use of Whitespace

3. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
Self-Join
UPDATE
INSERT INTO
Use of Whitespace

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

5. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
DBMS - Database Management System
char(size)
Row
ORDER BY

6. 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
SELECT
ORDER BY
Always define Primary Keys

7. Allows a comparison with multiple values from a list.
IN
COUNT()
number(size -d)
mysql

8. _______ column name FROM table name
ORDER BY
SELECT
LIKE
FROM

9. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
Keyword
SELECT *
DISTINCT
IN

10. A single field in a table. All tables are made up of one or more columns.
Column
HAVING
Self-Join
ASC

11. Specifies the tables or views from which rows and columns are retrieved
Self-Join
Use of Whitespace
char(size)
FROM

12. Database software (an application)
DBMS - Database Management System
Datatype
Self-Join
Row

13. A language designed specifically for communicating with databases.
Nested Subquery
SQL (Structured Query Language)
LIKE
MIN()

14. Limits the rows that appear in the result to those matching a specified condition
IN
AS
WHERE
Comparison Operators

15. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Comparison Operators
DBMS - Database Management System
HAVING
COUNT()

16. Denotes that the search condition is TRUE for at least one element that the subquery returns.
SELECT Statement
SQL extensions
ANY
char(size)

17. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
Self-Join
COUNT()
AVG()
Keyword

18. Primary way to do a query in SQL
ASC
SUM()
varchar(size)
SELECT Statement

19. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
DELETE
application
Breaking up data
MAX()

20. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
Nested Subquery
Comparison Operators
MIN()
HAVING

21. A record in a table
MAX()
Row
LIKE
AVG()

22. The container - usually a file or set of files - to store organized data
WHERE
HAVING
mysql
Database

23. Method used to copy multiple records at one time using a SELECT statement
Terminating Statements
AVG()
INSERT INTO
Commas

24. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
DESC
DBMS - Database Management System
Aggregate Functions
Datatype

25. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Commas
number(size -d)
Always define Primary Keys
ORDER BY

26. Provides a numerical tally of how many rows meet a specific set of criteria.
COUNT()
MIN()
DESC
DELETE

27. Ascending
DELETE
ASC
Aggregate Functions
SQL Statement and Case

28. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
MIN()
WHERE
Row
SQL extensions

29. SQL statements are case- insensitive
Table
SELECT Statement
SQL extensions
SQL Statement and Case

30. Limits the output of the established groups into the derived result group.
HAVING
Self-Join
Table
LIKE

31. Variable-length character string. Max size is specified in parenthesis.
SUM()
SELECT
varchar(size)
FROM

32. Multiple SQL statements must be separated by semicolons.
Keyword
SELECT *
FROM
Terminating Statements

33. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
GROUP BY
DESC
Breaking up data
SELECT

34. Simplest type of subquery.
SELECT *
Aggregate Functions
Simple Subquery
mysql

35. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
SQL (Structured Query Language)
ORDER BY
DBMS - Database Management System
GROUP BY

36. A popular open source database
DISTINCT
Always define Primary Keys
INSERT INTO
mysql

37. 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)
Primary Key
MAX()
Breaking up data

38. A column or set of columns whose values uniquely identify every row in a table.
number(size -d)
Primary Key
MAX()
DELETE

39. Specify one or more columns on which to order the display.
application
INSERT INTO
SQL extensions
ORDER BY

40. Descending
SELECT
INSERT INTO
Always define Primary Keys
DESC

41. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
Primary Key
LIKE
Terminating Statements
application

42. Alias
AS
DBMS - Database Management System
Use of Whitespace
Database

43. A structured list of data of a specific type
Use of Whitespace
LIKE
Keyword
Table

44. NOT - AND - OR
ORDER BY
SELECT
Logical Operators
Primary Key

45. Used to nest subqueries within another subquery.
Database
Nested Subquery
INSERT INTO
Table

46. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
Logical Operators
HAVING
AVG()
SUM()

47. 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.
Logical Operators
Table
Row
AVG()

48. COUNT() - MAX() - MIN() - SUM() and AVG()
Aggregate Functions
Use of Whitespace
COUNT()
Self-Join

49. SQL is a language NOT an _______
UPDATE
Database
application
COUNT()

50. Allows you to delete selected rows.
Commas
Always define Primary Keys
Keyword
DELETE