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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. A column or set of columns whose values uniquely identify every row in a table.
LIKE
FROM
DELETE
Primary Key

2. Specifies the tables or views from which rows and columns are retrieved
FROM
Simple Subquery
number(size -d)
MIN()

3. Limits the rows that appear in the result to those matching a specified condition
WHERE
Datatype
Primary Key
Self-Join

4. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
LIKE
Commas
SQL Statement and Case
Use of Whitespace

5. A single field in a table. All tables are made up of one or more columns.
MAX()
mysql
Column
SQL Statement and Case

6. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Comparison Operators
SQL extensions
ORDER BY
Use of Whitespace

7. Provides a numerical tally of how many rows meet a specific set of criteria.
DESC
SQL Statement and Case
COUNT()
INSERT INTO

8. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
AS
MIN()
Breaking up data
application

9. Descending
AVG()
Always define Primary Keys
Terminating Statements
DESC

10. Lets you change the values in one or more selected rows of a table.
ASC
Use of Whitespace
SELECT
UPDATE

11. Used to nest subqueries within another subquery.
number(size -d)
SQL (Structured Query Language)
Nested Subquery
SELECT

12. Used to select all the information in a specified column.
GROUP BY
Row
Self-Join
SELECT *

13. Simplest type of subquery.
Simple Subquery
COUNT()
HAVING
MIN()

14. Database software (an application)
SELECT Statement
Column
COUNT()
DBMS - Database Management System

15. Specify one or more columns on which to order the display.
Use of Whitespace
ORDER BY
Database
ANY

16. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
DISTINCT
GROUP BY
Self-Join
HAVING

17. Limits the output of the established groups into the derived result group.
Use of Whitespace
AS
HAVING
application

18. 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
ANY
AVG()
HAVING

19. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
DELETE
MAX()
GROUP BY
HAVING

20. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
MIN()
Logical Operators
HAVING
varchar(size)

21. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
DISTINCT
Database
Always define Primary Keys
INSERT INTO

22. Allows you to delete selected rows.
AS
MAX()
IN
DELETE

23. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
HAVING
Datatype
Comparison Operators
Table

24. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
Nested Subquery
SELECT *
char(size)
SQL extensions

25. SQL is a language NOT an _______
application
Comparison Operators
Self-Join
Commas

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

27. 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.
GROUP BY
AS
Self-Join
Always define Primary Keys

28. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Use of Whitespace
char(size)
Commas
FROM

29. Variable-length character string. Max size is specified in parenthesis.
Self-Join
UPDATE
varchar(size)
DESC

30. SQL statements are case- insensitive
UPDATE
FROM
Column
SQL Statement and Case

31. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
SQL Statement and Case
DBMS - Database Management System
Simple Subquery
char(size)

32. _______ column name FROM table name
SELECT
Always define Primary Keys
AS
GROUP BY

33. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
INSERT INTO
Self-Join
Logical Operators
GROUP BY

34. All extra whitespace within a SQL statement is is ignored when that statement is processed.
mysql
Use of Whitespace
MAX()
IN

35. A popular open source database
number(size -d)
Use of Whitespace
mysql
Comparison Operators

36. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
MIN()
ASC
SUM()
Comparison Operators

37. COUNT() - MAX() - MIN() - SUM() and AVG()
varchar(size)
AS
DBMS - Database Management System
Aggregate Functions

38. Multiple SQL statements must be separated by semicolons.
Terminating Statements
Primary Key
SQL (Structured Query Language)
Row

39. Primary way to do a query in SQL
SELECT Statement
SELECT
SQL Statement and Case
Terminating Statements

40. A structured list of data of a specific type
Table
Simple Subquery
ANY
Self-Join

41. The container - usually a file or set of files - to store organized data
Nested Subquery
Column
Database
SQL Statement and Case

42. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
ANY
Terminating Statements
Keyword
Comparison Operators

43. NOT - AND - OR
Self-Join
Logical Operators
mysql
SQL Statement and Case

44. 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)
MAX()
Always define Primary Keys
SELECT Statement

45. Alias
ORDER BY
AS
SUM()
Use of Whitespace

46. A record in a table
IN
Row
AS
ASC

47. A language designed specifically for communicating with databases.
MIN()
AVG()
SUM()
SQL (Structured Query Language)

48. Denotes that the search condition is TRUE for at least one element that the subquery returns.
mysql
ANY
DISTINCT
SUM()

49. Ascending
Simple Subquery
Breaking up data
ASC
SQL Statement and Case

50. Method used to copy multiple records at one time using a SELECT statement
INSERT INTO
ANY
Comparison Operators
SELECT *