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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. Descending
DESC
MAX()
Logical Operators
Row

2. Allows you to delete selected rows.
DELETE
Column
ASC
GROUP BY

3. 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
INSERT INTO
Logical Operators
AVG()

4. COUNT() - MAX() - MIN() - SUM() and AVG()
Aggregate Functions
Logical Operators
number(size -d)
Keyword

5. Allows a comparison with multiple values from a list.
Row
MAX()
IN
DISTINCT

6. Multiple SQL statements must be separated by semicolons.
Keyword
Comparison Operators
Column
Terminating Statements

7. All extra whitespace within a SQL statement is is ignored when that statement is processed.
AVG()
DISTINCT
Self-Join
Use of Whitespace

8. Specify one or more columns on which to order the display.
LIKE
SELECT Statement
Always define Primary Keys
ORDER BY

9. A language designed specifically for communicating with databases.
MIN()
SQL (Structured Query Language)
Use of Whitespace
UPDATE

10. Method used to copy multiple records at one time using a SELECT statement
SELECT
Keyword
mysql
INSERT INTO

11. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
Datatype
SELECT Statement
AS
IN

12. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
application
SQL extensions
SUM()
Simple Subquery

13. A single field in a table. All tables are made up of one or more columns.
Table
SQL (Structured Query Language)
Primary Key
Column

14. 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.
ANY
DISTINCT
Commas
Always define Primary Keys

15. Denotes that the search condition is TRUE for at least one element that the subquery returns.
SELECT
ANY
Simple Subquery
char(size)

16. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
mysql
WHERE
SQL extensions
ORDER BY

17. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
MAX()
application
char(size)
Row

18. SQL is a language NOT an _______
varchar(size)
application
AS
WHERE

19. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
MIN()
number(size -d)
varchar(size)
Commas

20. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
number(size -d)
MIN()
LIKE
Breaking up data

21. NOT - AND - OR
Column
LIKE
Logical Operators
Database

22. Limits the rows that appear in the result to those matching a specified condition
INSERT INTO
WHERE
HAVING
Keyword

23. Primary way to do a query in SQL
GROUP BY
Terminating Statements
SELECT Statement
Database

24. A popular open source database
SUM()
mysql
char(size)
SQL Statement and Case

25. Database software (an application)
DBMS - Database Management System
DELETE
Always define Primary Keys
IN

26. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
number(size -d)
LIKE
Nested Subquery
Keyword

27. Limits the output of the established groups into the derived result group.
HAVING
IN
INSERT INTO
SELECT Statement

28. Simplest type of subquery.
SELECT Statement
Simple Subquery
DBMS - Database Management System
LIKE

29. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
DESC
Keyword
number(size -d)
MAX()

30. Lets you change the values in one or more selected rows of a table.
Commas
UPDATE
GROUP BY
Row

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

32. Provides a numerical tally of how many rows meet a specific set of criteria.
COUNT()
Comparison Operators
Commas
IN

33. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
DISTINCT
MAX()
DELETE
INSERT INTO

34. Variable-length character string. Max size is specified in parenthesis.
mysql
IN
varchar(size)
SELECT Statement

35. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
SQL (Structured Query Language)
GROUP BY
LIKE
SUM()

36. A column or set of columns whose values uniquely identify every row in a table.
Primary Key
SELECT
AVG()
DBMS - Database Management System

37. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
Database
Keyword
UPDATE
ANY

38. Specifies the tables or views from which rows and columns are retrieved
FROM
Nested Subquery
DESC
MIN()

39. The container - usually a file or set of files - to store organized data
SELECT *
Database
char(size)
GROUP BY

40. A record in a table
Row
Always define Primary Keys
Column
Breaking up data

41. Ascending
ASC
Primary Key
mysql
char(size)

42. SQL statements are case- insensitive
SQL extensions
SQL Statement and Case
Breaking up data
SUM()

43. _______ column name FROM table name
Keyword
Terminating Statements
SELECT
Comparison Operators

44. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
HAVING
SELECT
MAX()
UPDATE

45. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
SUM()
Comparison Operators
SELECT Statement
Datatype

46. Used to nest subqueries within another subquery.
Terminating Statements
DISTINCT
DESC
Nested Subquery

47. A structured list of data of a specific type
Nested Subquery
Table
mysql
SELECT Statement

48. Alias
AS
WHERE
Keyword
number(size -d)

49. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Commas
DBMS - Database Management System
FROM
GROUP BY

50. Used to select all the information in a specified column.
SELECT *
AVG()
ORDER BY
MAX()