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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. _______ column name FROM table name
SQL extensions
FROM
SELECT
application

2. A record in a table
Table
SELECT
SELECT *
Row

3. A language designed specifically for communicating with databases.
SQL (Structured Query Language)
AS
AVG()
MAX()

4. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
DELETE
Self-Join
Simple Subquery
GROUP BY

5. Ascending
application
Primary Key
ASC
SUM()

6. Simplest type of subquery.
ASC
Simple Subquery
Self-Join
HAVING

7. Denotes that the search condition is TRUE for at least one element that the subquery returns.
number(size -d)
ANY
SELECT *
WHERE

8. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
SQL (Structured Query Language)
varchar(size)
LIKE
SQL extensions

9. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
HAVING
Keyword
Always define Primary Keys
Commas

10. 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.
SQL Statement and Case
Always define Primary Keys
AVG()
char(size)

11. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
MAX()
number(size -d)
AVG()
ORDER BY

12. The container - usually a file or set of files - to store organized data
DELETE
Simple Subquery
char(size)
Database

13. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
Datatype
number(size -d)
application
WHERE

14. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
Logical Operators
SQL extensions
ASC
MIN()

15. A popular open source database
AS
DELETE
Table
mysql

16. All extra whitespace within a SQL statement is is ignored when that statement is processed.
FROM
SUM()
Use of Whitespace
ANY

17. 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
INSERT INTO
UPDATE
ORDER BY

18. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
COUNT()
DISTINCT
char(size)
Always define Primary Keys

19. Limits the rows that appear in the result to those matching a specified condition
ASC
WHERE
SELECT *
UPDATE

20. Database software (an application)
Aggregate Functions
DBMS - Database Management System
SELECT
WHERE

21. SQL is a language NOT an _______
application
HAVING
DBMS - Database Management System
DESC

22. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
SELECT
char(size)
Nested Subquery
Datatype

23. Limits the output of the established groups into the derived result group.
SQL extensions
MAX()
Keyword
HAVING

24. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
Always define Primary Keys
HAVING
MAX()
Commas

25. Alias
Primary Key
COUNT()
Nested Subquery
AS

26. Used to select all the information in a specified column.
Comparison Operators
AS
SELECT *
DESC

27. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
SUM()
ANY
SQL extensions
Logical Operators

28. NOT - AND - OR
COUNT()
AVG()
varchar(size)
Logical Operators

29. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
ANY
HAVING
Breaking up data
Terminating Statements

30. Allows you to delete selected rows.
Simple Subquery
DELETE
LIKE
Datatype

31. COUNT() - MAX() - MIN() - SUM() and AVG()
Aggregate Functions
SELECT
mysql
Row

32. Method used to copy multiple records at one time using a SELECT statement
INSERT INTO
SQL Statement and Case
Always define Primary Keys
COUNT()

33. A column or set of columns whose values uniquely identify every row in a table.
Primary Key
Datatype
WHERE
DELETE

34. SQL statements are case- insensitive
SQL Statement and Case
Table
LIKE
SUM()

35. Used to nest subqueries within another subquery.
COUNT()
Primary Key
SQL Statement and Case
Nested Subquery

36. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
ANY
MIN()
ASC
SQL Statement and Case

37. Provides a numerical tally of how many rows meet a specific set of criteria.
COUNT()
Keyword
DBMS - Database Management System
SUM()

38. Multiple SQL statements must be separated by semicolons.
Terminating Statements
Simple Subquery
LIKE
mysql

39. Lets you change the values in one or more selected rows of a table.
ASC
UPDATE
SELECT
varchar(size)

40. Specify one or more columns on which to order the display.
LIKE
number(size -d)
Column
ORDER BY

41. Primary way to do a query in SQL
IN
ANY
SELECT Statement
SQL extensions

42. Variable-length character string. Max size is specified in parenthesis.
Keyword
ORDER BY
SELECT Statement
varchar(size)

43. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
ASC
Self-Join
DELETE
Terminating Statements

44. Allows a comparison with multiple values from a list.
IN
Breaking up data
DESC
Database

45. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
FROM
Commas
LIKE
SQL (Structured Query Language)

46. A single field in a table. All tables are made up of one or more columns.
ANY
MAX()
Terminating Statements
Column

47. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
SELECT Statement
Always define Primary Keys
COUNT()
Comparison Operators

48. Descending
DESC
IN
Primary Key
number(size -d)

49. A structured list of data of a specific type
varchar(size)
Nested Subquery
Table
DESC

50. Specifies the tables or views from which rows and columns are retrieved
LIKE
SUM()
FROM
WHERE