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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. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
GROUP BY
SQL Statement and Case
SQL extensions
Logical Operators

2. Primary way to do a query in SQL
SELECT Statement
SELECT
Terminating Statements
DBMS - Database Management System

3. Limits the rows that appear in the result to those matching a specified condition
Nested Subquery
ASC
WHERE
Simple Subquery

4. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
Breaking up data
SQL extensions
LIKE
ASC

5. All extra whitespace within a SQL statement is is ignored when that statement is processed.
Always define Primary Keys
mysql
number(size -d)
Use of Whitespace

6. Lets you change the values in one or more selected rows of a table.
FROM
Keyword
UPDATE
Nested Subquery

7. SQL statements are case- insensitive
SELECT Statement
HAVING
SQL Statement and Case
Breaking up data

8. The container - usually a file or set of files - to store organized data
ASC
Database
MIN()
Comparison Operators

9. A column or set of columns whose values uniquely identify every row in a table.
Datatype
char(size)
Self-Join
Primary Key

10. Simplest type of subquery.
Simple Subquery
SELECT *
Self-Join
Row

11. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Logical Operators
char(size)
AS
Comparison Operators

12. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
MAX()
LIKE
Aggregate Functions
char(size)

13. Method used to copy multiple records at one time using a SELECT statement
SQL Statement and Case
Simple Subquery
AVG()
INSERT INTO

14. COUNT() - MAX() - MIN() - SUM() and AVG()
SUM()
MIN()
Aggregate Functions
Breaking up data

15. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
SELECT
COUNT()
Use of Whitespace
Breaking up data

16. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
SELECT
SQL (Structured Query Language)
AVG()
Commas

17. 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.
Use of Whitespace
Always define Primary Keys
AVG()
varchar(size)

18. 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.
WHERE
Logical Operators
Terminating Statements
Always define Primary Keys

19. Provides a numerical tally of how many rows meet a specific set of criteria.
Nested Subquery
COUNT()
AVG()
Datatype

20. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
ORDER BY
DBMS - Database Management System
DISTINCT
SQL (Structured Query Language)

21. Database software (an application)
ORDER BY
varchar(size)
MIN()
DBMS - Database Management System

22. A language designed specifically for communicating with databases.
DBMS - Database Management System
LIKE
SQL (Structured Query Language)
number(size -d)

23. Descending
Aggregate Functions
varchar(size)
Primary Key
DESC

24. Specifies the tables or views from which rows and columns are retrieved
mysql
SUM()
FROM
Database

25. Limits the output of the established groups into the derived result group.
HAVING
MIN()
application
ASC

26. SQL is a language NOT an _______
SQL extensions
Keyword
application
mysql

27. Used to nest subqueries within another subquery.
Nested Subquery
Self-Join
FROM
SQL Statement and Case

28. NOT - AND - OR
Logical Operators
WHERE
Database
LIKE

29. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
Comparison Operators
GROUP BY
SELECT Statement
char(size)

30. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
Datatype
number(size -d)
WHERE
INSERT INTO

31. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
MAX()
Row
SQL (Structured Query Language)
SUM()

32. A structured list of data of a specific type
INSERT INTO
Table
WHERE
DISTINCT

33. A single field in a table. All tables are made up of one or more columns.
Column
char(size)
SELECT *
AS

34. Denotes that the search condition is TRUE for at least one element that the subquery returns.
COUNT()
AS
ASC
ANY

35. Allows a comparison with multiple values from a list.
IN
SQL extensions
Column
SELECT Statement

36. Ascending
ASC
SQL (Structured Query Language)
COUNT()
AS

37. Multiple SQL statements must be separated by semicolons.
Table
Datatype
SQL (Structured Query Language)
Terminating Statements

38. A record in a table
ORDER BY
Row
DISTINCT
Datatype

39. _______ column name FROM table name
Simple Subquery
SELECT *
SELECT
MAX()

40. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
Logical Operators
char(size)
Always define Primary Keys
Datatype

41. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
FROM
IN
MIN()
WHERE

42. Allows you to delete selected rows.
Primary Key
MAX()
GROUP BY
DELETE

43. Used to select all the information in a specified column.
Always define Primary Keys
SELECT *
IN
varchar(size)

44. Alias
DESC
Nested Subquery
varchar(size)
AS

45. Variable-length character string. Max size is specified in parenthesis.
varchar(size)
Always define Primary Keys
SQL Statement and Case
char(size)

46. Specify one or more columns on which to order the display.
Commas
ORDER BY
ANY
DESC

47. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
MIN()
SUM()
SELECT *
LIKE

48. A popular open source database
varchar(size)
LIKE
mysql
INSERT INTO

49. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
SELECT Statement
Keyword
mysql
Nested Subquery

50. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
Keyword
Self-Join
application
Logical Operators