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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. Primary way to do a query in SQL
ASC
Simple Subquery
SELECT Statement
char(size)

2. A column or set of columns whose values uniquely identify every row in a table.
Terminating Statements
DESC
Database
Primary Key

3. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
SELECT
SQL Statement and Case
MAX()
DISTINCT

4. A language designed specifically for communicating with databases.
INSERT INTO
SQL (Structured Query Language)
GROUP BY
UPDATE

5. Allows you to delete selected rows.
GROUP BY
AVG()
IN
DELETE

6. NOT - AND - OR
DESC
Logical Operators
char(size)
COUNT()

7. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
AS
number(size -d)
UPDATE
INSERT INTO

8. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
SELECT Statement
Table
Self-Join
Primary Key

9. COUNT() - MAX() - MIN() - SUM() and AVG()
DESC
GROUP BY
Aggregate Functions
Terminating Statements

10. _______ column name FROM table name
GROUP BY
SELECT
Nested Subquery
Datatype

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

12. Used to nest subqueries within another subquery.
WHERE
mysql
Nested Subquery
Terminating Statements

13. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
Datatype
Keyword
number(size -d)
Use of Whitespace

14. SQL statements are case- insensitive
Database
Simple Subquery
SQL Statement and Case
Column

15. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
MIN()
Always define Primary Keys
INSERT INTO
Datatype

16. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
GROUP BY
MAX()
Logical Operators
DELETE

17. The container - usually a file or set of files - to store organized data
char(size)
Database
number(size -d)
SQL (Structured Query Language)

18. All extra whitespace within a SQL statement is is ignored when that statement is processed.
INSERT INTO
ORDER BY
Use of Whitespace
UPDATE

19. Database software (an application)
Datatype
Self-Join
DBMS - Database Management System
DESC

20. SQL is a language NOT an _______
application
Always define Primary Keys
AVG()
AS

21. Method used to copy multiple records at one time using a SELECT statement
Use of Whitespace
SELECT Statement
Logical Operators
INSERT INTO

22. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
LIKE
INSERT INTO
GROUP BY
UPDATE

23. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
SQL extensions
Primary Key
Self-Join
Terminating Statements

24. Specifies the tables or views from which rows and columns are retrieved
Primary Key
SELECT *
FROM
mysql

25. A popular open source database
varchar(size)
COUNT()
mysql
application

26. Multiple SQL statements must be separated by semicolons.
Logical Operators
number(size -d)
SELECT
Terminating Statements

27. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
DISTINCT
Self-Join
INSERT INTO
HAVING

28. Limits the output of the established groups into the derived result group.
Self-Join
DBMS - Database Management System
IN
HAVING

29. Specify one or more columns on which to order the display.
Aggregate Functions
Breaking up data
IN
ORDER BY

30. Simplest type of subquery.
HAVING
Keyword
Simple Subquery
DISTINCT

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

32. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
Aggregate Functions
application
Simple Subquery
char(size)

33. Alias
AS
SQL extensions
Breaking up data
SQL Statement and Case

34. Provides a numerical tally of how many rows meet a specific set of criteria.
AVG()
COUNT()
Table
Keyword

35. Denotes that the search condition is TRUE for at least one element that the subquery returns.
LIKE
Terminating Statements
Simple Subquery
ANY

36. Ascending
COUNT()
number(size -d)
DESC
ASC

37. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
char(size)
Breaking up data
WHERE
UPDATE

38. Limits the rows that appear in the result to those matching a specified condition
Database
DISTINCT
WHERE
Keyword

39. Variable-length character string. Max size is specified in parenthesis.
Row
varchar(size)
ANY
Use of Whitespace

40. Used to select all the information in a specified column.
Self-Join
Always define Primary Keys
Row
SELECT *

41. A structured list of data of a specific type
DBMS - Database Management System
Table
MAX()
FROM

42. A record in a table
FROM
Keyword
Row
Column

43. A single field in a table. All tables are made up of one or more columns.
Column
SQL Statement and Case
DBMS - Database Management System
Breaking up data

44. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Logical Operators
DISTINCT
SELECT
Commas

45. Descending
Commas
Comparison Operators
SELECT *
DESC

46. 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.
ORDER BY
AVG()
Simple Subquery
mysql

47. 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.
Keyword
ORDER BY
FROM
Always define Primary Keys

48. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Table
Comparison Operators
Column
UPDATE

49. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
AS
MIN()
Datatype
SELECT Statement

50. Allows a comparison with multiple values from a list.
SELECT
IN
AVG()
Commas