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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. Lets you change the values in one or more selected rows of a table.
UPDATE
Always define Primary Keys
Row
Nested Subquery

2. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
LIKE
Comparison Operators
Table
HAVING

3. Specifies the tables or views from which rows and columns are retrieved
FROM
Terminating Statements
Logical Operators
Nested Subquery

4. A structured list of data of a specific type
char(size)
Terminating Statements
Table
LIKE

5. A single field in a table. All tables are made up of one or more columns.
Database
Column
Aggregate Functions
char(size)

6. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
ASC
MAX()
number(size -d)
LIKE

7. Specify one or more columns on which to order the display.
SELECT Statement
DISTINCT
ORDER BY
Nested Subquery

8. All extra whitespace within a SQL statement is is ignored when that statement is processed.
ORDER BY
Logical Operators
SQL (Structured Query Language)
Use of Whitespace

9. Descending
HAVING
DESC
Simple Subquery
Use of Whitespace

10. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
Breaking up data
SELECT
ASC
Nested Subquery

11. _______ column name FROM table name
Use of Whitespace
INSERT INTO
SELECT
MAX()

12. A language designed specifically for communicating with databases.
SQL (Structured Query Language)
char(size)
AVG()
MIN()

13. A record in a table
SQL (Structured Query Language)
Row
Table
ANY

14. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
AVG()
MIN()
SELECT Statement
Breaking up data

15. Variable-length character string. Max size is specified in parenthesis.
char(size)
UPDATE
varchar(size)
FROM

16. Ascending
COUNT()
ASC
SQL Statement and Case
AS

17. A popular open source database
AS
mysql
MAX()
Commas

18. COUNT() - MAX() - MIN() - SUM() and AVG()
SQL extensions
LIKE
Terminating Statements
Aggregate Functions

19. 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.
AVG()
MAX()
HAVING
char(size)

20. Alias
AS
Self-Join
SELECT *
Keyword

21. 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.
SQL (Structured Query Language)
Use of Whitespace
DBMS - Database Management System
Always define Primary Keys

22. Limits the output of the established groups into the derived result group.
HAVING
varchar(size)
ORDER BY
DESC

23. A column or set of columns whose values uniquely identify every row in a table.
char(size)
Primary Key
SQL (Structured Query Language)
HAVING

24. Provides a numerical tally of how many rows meet a specific set of criteria.
SELECT *
AVG()
COUNT()
Primary Key

25. Limits the rows that appear in the result to those matching a specified condition
SUM()
HAVING
WHERE
COUNT()

26. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
DBMS - Database Management System
char(size)
GROUP BY
Nested Subquery

27. SQL statements are case- insensitive
MAX()
SELECT Statement
SQL Statement and Case
COUNT()

28. Allows you to delete selected rows.
DELETE
SQL (Structured Query Language)
MAX()
GROUP BY

29. Method used to copy multiple records at one time using a SELECT statement
Table
INSERT INTO
MAX()
SQL Statement and Case

30. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
MIN()
Datatype
Nested Subquery
DBMS - Database Management System

31. Used to nest subqueries within another subquery.
GROUP BY
SELECT *
Nested Subquery
SUM()

32. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
SQL extensions
ORDER BY
Use of Whitespace
COUNT()

33. Simplest type of subquery.
Column
AVG()
WHERE
Simple Subquery

34. Primary way to do a query in SQL
SELECT Statement
Self-Join
Aggregate Functions
Logical Operators

35. Used to select all the information in a specified column.
SELECT *
application
DBMS - Database Management System
number(size -d)

36. NOT - AND - OR
SUM()
MIN()
Logical Operators
HAVING

37. Database software (an application)
Logical Operators
DESC
ASC
DBMS - Database Management System

38. Allows a comparison with multiple values from a list.
LIKE
IN
SELECT Statement
char(size)

39. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
FROM
SUM()
char(size)
SELECT

40. Multiple SQL statements must be separated by semicolons.
Breaking up data
Terminating Statements
SUM()
Commas

41. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
DISTINCT
Row
Comparison Operators
DBMS - Database Management System

42. Denotes that the search condition is TRUE for at least one element that the subquery returns.
Terminating Statements
ANY
FROM
LIKE

43. The container - usually a file or set of files - to store organized data
Aggregate Functions
mysql
Database
ORDER BY

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.
MIN()
number(size -d)
SUM()
ASC

45. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
SQL extensions
ASC
SELECT *
GROUP BY

46. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
Always define Primary Keys
Self-Join
Breaking up data
Primary Key

47. SQL is a language NOT an _______
MAX()
SELECT *
COUNT()
application

48. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
FROM
DBMS - Database Management System
LIKE
varchar(size)

49. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Commas
UPDATE
ORDER BY
INSERT INTO

50. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
char(size)
SUM()
Keyword
application