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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 a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
Nested Subquery
GROUP BY
SELECT *
MIN()

2. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Commas
mysql
IN
Always define Primary Keys

3. SQL is a language NOT an _______
application
Commas
AVG()
ANY

4. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
Commas
Self-Join
LIKE
number(size -d)

5. A record in a table
SUM()
ASC
Row
SQL extensions

6. The container - usually a file or set of files - to store organized data
Table
Terminating Statements
Database
mysql

7. Method used to copy multiple records at one time using a SELECT statement
SELECT
AS
INSERT INTO
GROUP BY

8. Ascending
Self-Join
Breaking up data
Keyword
ASC

9. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
SELECT Statement
Keyword
Datatype
AVG()

10. Provides a numerical tally of how many rows meet a specific set of criteria.
Primary Key
Nested Subquery
COUNT()
Breaking up data

11. All extra whitespace within a SQL statement is is ignored when that statement is processed.
SQL (Structured Query Language)
Use of Whitespace
DISTINCT
Row

12. Limits the output of the established groups into the derived result group.
SELECT Statement
application
Breaking up data
HAVING

13. Used to nest subqueries within another subquery.
GROUP BY
Nested Subquery
IN
AS

14. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
SUM()
Primary Key
char(size)
SELECT

15. COUNT() - MAX() - MIN() - SUM() and AVG()
Aggregate Functions
DESC
Breaking up data
LIKE

16. Used to select all the information in a specified column.
Self-Join
SELECT *
Comparison Operators
ORDER BY

17. NOT - AND - OR
char(size)
ASC
Column
Logical Operators

18. 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
DELETE
Self-Join
Aggregate Functions

19. Database software (an application)
AS
DBMS - Database Management System
Use of Whitespace
FROM

20. Primary way to do a query in SQL
SELECT Statement
AVG()
INSERT INTO
number(size -d)

21. Variable-length character string. Max size is specified in parenthesis.
Table
varchar(size)
ANY
Breaking up data

22. A structured list of data of a specific type
mysql
Comparison Operators
MAX()
Table

23. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
DELETE
MIN()
LIKE
FROM

24. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
Use of Whitespace
Keyword
Nested Subquery
ORDER BY

25. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Comparison Operators
application
Database
Table

26. Multiple SQL statements must be separated by semicolons.
GROUP BY
ASC
Terminating Statements
SUM()

27. Alias
DBMS - Database Management System
AS
SQL (Structured Query Language)
LIKE

28. Specifies the tables or views from which rows and columns are retrieved
UPDATE
Self-Join
FROM
WHERE

29. 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.
Comparison Operators
AVG()
Nested Subquery
number(size -d)

30. _______ column name FROM table name
SELECT
DISTINCT
Self-Join
SQL extensions

31. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
SQL Statement and Case
Simple Subquery
Breaking up data
MAX()

32. Simplest type of subquery.
Database
Aggregate Functions
SUM()
Simple Subquery

33. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
DISTINCT
Row
GROUP BY
SELECT

34. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
IN
SUM()
Self-Join
Datatype

35. Specify one or more columns on which to order the display.
Breaking up data
SELECT Statement
char(size)
ORDER BY

36. Limits the rows that appear in the result to those matching a specified condition
Table
ORDER BY
WHERE
MIN()

37. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
SQL (Structured Query Language)
MAX()
Breaking up data
UPDATE

38. SQL statements are case- insensitive
SQL Statement and Case
Commas
Terminating Statements
Datatype

39. Allows a comparison with multiple values from a list.
Nested Subquery
IN
HAVING
Terminating Statements

40. Descending
DESC
application
ANY
DBMS - Database Management System

41. Denotes that the search condition is TRUE for at least one element that the subquery returns.
GROUP BY
ANY
Comparison Operators
UPDATE

42. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
Logical Operators
DESC
GROUP BY
Column

43. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
MIN()
SQL extensions
AVG()
GROUP BY

44. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
SUM()
SQL Statement and Case
DBMS - Database Management System
SELECT Statement

45. A column or set of columns whose values uniquely identify every row in a table.
Commas
Primary Key
WHERE
char(size)

46. Lets you change the values in one or more selected rows of a table.
SQL (Structured Query Language)
UPDATE
Table
WHERE

47. A popular open source database
UPDATE
MIN()
mysql
Simple Subquery

48. A language designed specifically for communicating with databases.
SELECT
HAVING
UPDATE
SQL (Structured Query Language)

49. A single field in a table. All tables are made up of one or more columns.
DISTINCT
application
Column
Use of Whitespace

50. Allows you to delete selected rows.
SQL Statement and Case
WHERE
INSERT INTO
DELETE