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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. The container - usually a file or set of files - to store organized data
MAX()
Database
Nested Subquery
DISTINCT

2. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
Primary Key
Breaking up data
number(size -d)
Self-Join

3. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
MIN()
LIKE
INSERT INTO
Keyword

4. Multiple SQL statements must be separated by semicolons.
Terminating Statements
Datatype
mysql
Logical Operators

5. Database software (an application)
DBMS - Database Management System
Table
SQL Statement and Case
ASC

6. Lets you change the values in one or more selected rows of a table.
UPDATE
DISTINCT
ANY
ORDER BY

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

8. A structured list of data of a specific type
Keyword
Table
AVG()
Row

9. _______ column name FROM table name
char(size)
SELECT
LIKE
Datatype

10. Descending
SQL (Structured Query Language)
UPDATE
SQL Statement and Case
DESC

11. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
Aggregate Functions
INSERT INTO
mysql
SUM()

12. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
ASC
DBMS - Database Management System
ANY
Datatype

13. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
MAX()
SELECT Statement
varchar(size)
DBMS - Database Management System

14. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
application
char(size)
Commas
UPDATE

15. A record in a table
Row
Logical Operators
Use of Whitespace
LIKE

16. Specify one or more columns on which to order the display.
DELETE
Column
Logical Operators
ORDER BY

17. Denotes that the search condition is TRUE for at least one element that the subquery returns.
Commas
ANY
DESC
AS

18. 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)
WHERE
IN
HAVING

19. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
number(size -d)
Datatype
LIKE
Row

20. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
DESC
char(size)
SQL extensions
Breaking up data

21. Simplest type of subquery.
Simple Subquery
SELECT Statement
ORDER BY
Table

22. Alias
ANY
INSERT INTO
AS
SELECT *

23. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
SQL (Structured Query Language)
Breaking up data
GROUP BY
Self-Join

24. COUNT() - MAX() - MIN() - SUM() and AVG()
Use of Whitespace
Table
ORDER BY
Aggregate Functions

25. A popular open source database
INSERT INTO
UPDATE
DELETE
mysql

26. A language designed specifically for communicating with databases.
Breaking up data
SQL (Structured Query Language)
DESC
Logical Operators

27. SQL statements are case- insensitive
FROM
GROUP BY
Datatype
SQL Statement and Case

28. All extra whitespace within a SQL statement is is ignored when that statement is processed.
Comparison Operators
Use of Whitespace
Breaking up data
DELETE

29. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
WHERE
Always define Primary Keys
Comparison Operators
SELECT

30. Limits the rows that appear in the result to those matching a specified condition
Nested Subquery
ORDER BY
SELECT
WHERE

31. Method used to copy multiple records at one time using a SELECT statement
Breaking up data
DESC
INSERT INTO
Commas

32. 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
SQL Statement and Case
Always define Primary Keys
COUNT()

33. Allows you to delete selected rows.
GROUP BY
Self-Join
DELETE
SELECT

34. NOT - AND - OR
SELECT
ASC
Logical Operators
ORDER BY

35. Used to nest subqueries within another subquery.
MAX()
SQL extensions
Nested Subquery
SELECT

36. Primary way to do a query in SQL
SQL (Structured Query Language)
SELECT Statement
Comparison Operators
SUM()

37. A column or set of columns whose values uniquely identify every row in a table.
Primary Key
DELETE
Comparison Operators
Table

38. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
MIN()
ANY
mysql
SQL extensions

39. Allows a comparison with multiple values from a list.
AS
IN
ANY
DBMS - Database Management System

40. Ascending
SELECT *
ORDER BY
INSERT INTO
ASC

41. 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()
FROM
Always define Primary Keys

42. Provides a numerical tally of how many rows meet a specific set of criteria.
COUNT()
Row
number(size -d)
ANY

43. Specifies the tables or views from which rows and columns are retrieved
LIKE
FROM
SELECT
MIN()

44. Variable-length character string. Max size is specified in parenthesis.
varchar(size)
Row
FROM
DISTINCT

45. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
DISTINCT
SQL (Structured Query Language)
Terminating Statements
IN

46. A single field in a table. All tables are made up of one or more columns.
varchar(size)
SUM()
Primary Key
Column

47. Used to select all the information in a specified column.
Datatype
SELECT *
Simple Subquery
IN

48. Limits the output of the established groups into the derived result group.
HAVING
application
Terminating Statements
INSERT INTO

49. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
Use of Whitespace
ANY
SQL extensions
Always define Primary Keys

50. SQL is a language NOT an _______
ORDER BY
application
Breaking up data
Row