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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. Primary way to do a query in SQL
SELECT Statement
Logical Operators
DELETE
SQL Statement and Case

2. A reserved word that is part of the SQL language. Never name a table or column using a keyword.
ASC
SUM()
Datatype
Keyword

3. Takes all of the values in that column and adds them together. Only works on columns containing numeric data.
SUM()
varchar(size)
DISTINCT
SELECT Statement

4. Used to select all the information in a specified column.
SQL Statement and Case
Terminating Statements
SELECT *
Self-Join

5. Provides a numerical tally of how many rows meet a specific set of criteria.
Column
UPDATE
Database
COUNT()

6. Specify one or more columns on which to order the display.
ORDER BY
MAX()
Aggregate Functions
ANY

7. Limits the rows that appear in the result to those matching a specified condition
COUNT()
FROM
Database
WHERE

8. = Equals - < Less Than - > Greater Than - <= Less Than or Equal To - >= Greater Than or Equal To - <> Not Equal - ! Negation of
Table
Comparison Operators
GROUP BY
ANY

9. Ascending
Comparison Operators
ASC
LIKE
Commas

10. Database software (an application)
mysql
DBMS - Database Management System
LIKE
Terminating Statements

11. A popular open source database
MAX()
GROUP BY
mysql
Row

12. The container - usually a file or set of files - to store organized data
Self-Join
Terminating Statements
IN
Database

13. Alias
AS
AVG()
SELECT *
Simple Subquery

14. Method used to copy multiple records at one time using a SELECT statement
INSERT INTO
char(size)
SELECT *
mysql

15. Allows you to delete selected rows.
Primary Key
Database
DELETE
SQL Statement and Case

16. 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.
MAX()
Row
AVG()
ORDER BY

17. SQL statements are case- insensitive
Simple Subquery
Database
SQL Statement and Case
Primary Key

18. A structured list of data of a specific type
AS
Aggregate Functions
INSERT INTO
Table

19. A record in a table
Row
ORDER BY
Always define Primary Keys
application

20. Limits the output of the established groups into the derived result group.
Self-Join
HAVING
SELECT Statement
Keyword

21. Descending
MIN()
DESC
application
IN

22. Allows a comparison with multiple values from a list.
IN
Nested Subquery
Datatype
Aggregate Functions

23. SQL is a language NOT an _______
INSERT INTO
application
Column
mysql

24. 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.
Nested Subquery
SQL extensions
Always define Primary Keys
Use of Whitespace

25. A column or set of columns whose values uniquely identify every row in a table.
MAX()
application
Primary Key
Always define Primary Keys

26. Specifies the tables or views from which rows and columns are retrieved
FROM
COUNT()
Commas
ANY

27. A language designed specifically for communicating with databases.
SELECT Statement
SQL (Structured Query Language)
IN
DBMS - Database Management System

28. Lets you use a single- or multiple-character wildcards. Also - this command does not function in Microsoft Access.
ORDER BY
SQL extensions
Self-Join
LIKE

29. Number value with a maximum number of digits of "size" total - with a maximum number of "d" digits to the right of the decimal.
MAX()
ASC
Always define Primary Keys
number(size -d)

30. _______ column name FROM table name
Self-Join
AS
SELECT
Commas

31. NOT - AND - OR
Logical Operators
number(size -d)
DESC
Database

32. Used to nest subqueries within another subquery.
WHERE
varchar(size)
Aggregate Functions
Nested Subquery

33. Takes a single numeric or alphabetic cloumn and finds the HIGHEST constant value within it.
mysql
char(size)
IN
MAX()

34. Lets you change the values in one or more selected rows of a table.
UPDATE
SELECT Statement
Database
LIKE

35. Fixed-length character string. Size is specified in parenthesis. Max 255 bytes.
char(size)
DESC
LIKE
SQL (Structured Query Language)

36. A type of allowed data. Every table column has a datatype that restricts specific data in that column.
Datatype
SQL (Structured Query Language)
Use of Whitespace
Always define Primary Keys

37. Data must be broken into multiple columns correctly. For example - city - state - and zip should always separate columns.
Breaking up data
char(size)
SQL extensions
FROM

38. Simplest type of subquery.
INSERT INTO
MAX()
Keyword
Simple Subquery

39. Prevents duplicate values witihin a table or group of rows from being used in the evaluation of the function's result
DISTINCT
GROUP BY
Commas
varchar(size)

40. COUNT() - MAX() - MIN() - SUM() and AVG()
Keyword
SELECT *
DISTINCT
Aggregate Functions

41. Multiple SQL statements must be separated by semicolons.
DISTINCT
Terminating Statements
Simple Subquery
MAX()

42. Usually DBMS specific - these can provide extra functionality or simplified ways to perform specific operations.
Aggregate Functions
mysql
MIN()
SQL extensions

43. Combines rows from a SELECT statement's results table into groups in which specified columns have the same value.
DELETE
ASC
GROUP BY
DBMS - Database Management System

44. A single field in a table. All tables are made up of one or more columns.
char(size)
Column
DELETE
GROUP BY

45. Variable-length character string. Max size is specified in parenthesis.
Aggregate Functions
varchar(size)
Always define Primary Keys
ANY

46. Allows you to correlate information between different rows of the same table and combine this information in rows of a result table.
COUNT()
Row
Self-Join
SUM()

47. All extra whitespace within a SQL statement is is ignored when that statement is processed.
Use of Whitespace
SQL (Structured Query Language)
Commas
LIKE

48. When selecting multiple columns be sure to specify a _____ BETWEEN each column name but NOT after the last column name.
number(size -d)
Commas
GROUP BY
ORDER BY

49. Denotes that the search condition is TRUE for at least one element that the subquery returns.
DELETE
ASC
ANY
SQL (Structured Query Language)

50. Takes a single numeric or alphabetic cloumn and finds the LOWEST constant value within it.
Nested Subquery
INSERT INTO
MIN()
application