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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 structured list of data of a specific type
Database
Table
Commas
number(size -d)

2. Variable-length character string. Max size is specified in parenthesis.
char(size)
Logical Operators
varchar(size)
IN

3. COUNT() - MAX() - MIN() - SUM() and AVG()
INSERT INTO
Simple Subquery
WHERE
Aggregate Functions

4. Used to nest subqueries within another subquery.
Nested Subquery
FROM
AVG()
SUM()

5. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
LIKE
Datatype
Logical Operators
SELECT *

6. Ascending
SELECT *
ASC
LIKE
AVG()

7. Used to select all the information in a specified column.
ASC
Always define Primary Keys
SELECT *
Nested Subquery

8. SQL statements are case- insensitive
IN
SQL extensions
LIKE
SQL Statement and Case

9. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
MIN()
AS
Commas
varchar(size)

10. The container - usually a file or set of files - to store organized data
WHERE
Commas
Breaking up data
Database

11. _______ column name FROM table name
MIN()
application
SELECT
ASC

12. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
SUM()
INSERT INTO
Breaking up data
Always define Primary Keys

13. Descending
SQL (Structured Query Language)
FROM
DESC
GROUP BY

14. Provides a numerical tally of how many rows meet a specific set of criteria.
COUNT()
ANY
SELECT Statement
ASC

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

16. Alias
application
Logical Operators
AS
Primary Key

17. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
Breaking up data
MIN()
Logical Operators
Self-Join

18. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
Commas
number(size -d)
WHERE
varchar(size)

19. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
Breaking up data
SQL Statement and Case
char(size)
Self-Join

20. 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
DBMS - Database Management System
Database
Row

21. A language designed specifically for communicating with databases.
ANY
LIKE
SQL (Structured Query Language)
Always define Primary Keys

22. A column or set of columns whose values uniquely identify every row in a table.
LIKE
DESC
mysql
Primary Key

23. Simplest type of subquery.
Primary Key
Table
Simple Subquery
application

24. Limits the output of the established groups into the derived result group.
IN
Breaking up data
HAVING
AS

25. Method used to copy multiple records at one time using a SELECT statement
Nested Subquery
Simple Subquery
INSERT INTO
Row

26. Specifies the tables or views from which rows and columns are retrieved
FROM
INSERT INTO
varchar(size)
DISTINCT

27. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
mysql
DISTINCT
number(size -d)
Datatype

28. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
Keyword
AS
SELECT Statement
Primary Key

29. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
Self-Join
SELECT Statement
DISTINCT
ORDER BY

30. A popular open source database
SELECT *
Terminating Statements
MIN()
mysql

31. A record in a table
Terminating Statements
Row
char(size)
INSERT INTO

32. Allows a comparison with multiple values from a list.
LIKE
ORDER BY
IN
Comparison Operators

33. All extra whitespace within a SQL statement is is ignored when that statement is processed.
SELECT
Column
AVG()
Use of Whitespace

34. Allows you to delete selected rows.
ASC
DESC
DELETE
Use of Whitespace

35. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
MIN()
char(size)
AVG()
SQL Statement and Case

36. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
GROUP BY
ANY
Row
Breaking up data

37. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
LIKE
DELETE
DESC
HAVING

38. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
GROUP BY
DBMS - Database Management System
Comparison Operators
MAX()

39. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
SELECT Statement
Comparison Operators
Logical Operators
Table

40. 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.
varchar(size)
number(size -d)
AVG()
AS

41. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
SELECT Statement
SQL extensions
Column
Terminating Statements

42. Database software (an application)
SUM()
Column
DBMS - Database Management System
Commas

43. Multiple SQL statements must be separated by semicolons.
SQL (Structured Query Language)
Terminating Statements
SQL Statement and Case
SUM()

44. Specify one or more columns on which to order the display.
SQL extensions
Row
ORDER BY
Comparison Operators

45. Lets you change the values in one or more selected rows of a table.
number(size -d)
Aggregate Functions
GROUP BY
UPDATE

46. Limits the rows that appear in the result to those matching a specified condition
char(size)
application
Primary Key
WHERE

47. A single field in a table. All tables are made up of one or more columns.
Keyword
Datatype
Primary Key
Column

48. SQL is a language NOT an _______
Datatype
WHERE
application
DELETE

49. NOT - AND - OR
Logical Operators
Keyword
AVG()
Self-Join

50. Primary way to do a query in SQL
SELECT Statement
IN
Datatype
SQL (Structured Query Language)