A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Chapter 7, Problem 3SCG
Create a view named CONDO_FEES. It consists of two columns: the first is the square footage, and the second is the average fee for all condos in the CONDO_UNIT table that have that square footage. Use AVERAGE_FEE as the column name for the average fee. Group and order the rows by square footage.
- a. Write and execute the CREATE VIEW command to create the CONDO_FEES view.
- b. Write and execute the command to retrieve the square footage and average fee for each square footage for which the average fee is greater than $500.
- c. Write and execute the query that the DBMS actually executes.
- d. Does updating the
database through this view create any problems? If so, what are they? If not, why not?
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Create a view named MONTHLY_RENTS. It consists of three columns: the first is the number of bedrooms, the second is the average square feet, and the third is the average monthly rent for all properties in the PROPERTY table that have that number of bedrooms. Use BEDROOMS, AVG_SQUARE_FEET, and AVG_MONTHLY_RENT as the column names. Group and order the rows by number of bedrooms.
2
Task 7: Create a view named MONTHLY_RENTS. It consists of three columns: the first is the number of bedrooms, the second is the average square feet, and the third is the average monthly rent for all properties in the PROPERTY table that have that number of bedrooms. Use BEDROOMS, AVG_SQUARE_FEET, and AVG_MONTHLY_RENT as the column names. Group and order the rows by number of bedrooms.
Task 8: Write and execute the command to retrieve the average square footage and average monthly rent for each property for which the average monthly rent is greater than $1,400.
I am working on Task 7.
Task 7: Create a view named MONTHLY_RENTS. It consists of three columns: the first is the number of bedrooms, the second is the average square feet, and the third is the average monthly rent for all properties in the PROPERTY table that have that number of bedrooms. Use BEDROOMS, AVG_SQUARE_FEET, and AVG_MONTHLY_RENT as the column names. Group and order the rows by number of bedrooms.
Here is Tasks 1-7 and what I wrote for Task 8.
When I input Task 8, I am not getting results at all.
Expected Results
Tables_in_StayWell
Table_type
MONTHLY_RENTS
VIEW
Chapter 7 Solutions
A Guide to SQL
Ch. 7 - What is a view?Ch. 7 - Which command creates a view?Ch. 7 - Prob. 3RQCh. 7 - What happens when a user retrieves data from a...Ch. 7 - What are three advantages of using views?Ch. 7 - Which command deletes a view?Ch. 7 - Prob. 8RQCh. 7 - Which command terminates previously granted...Ch. 7 - Prob. 10RQCh. 7 - How do you create an index? How do you create a...
Ch. 7 - Prob. 12RQCh. 7 - Does the DBMS or the user make the choice of which...Ch. 7 - Describe the information the DBMS maintains in the...Ch. 7 - The CUSTOMER table contains a foreign key,...Ch. 7 - Prob. 16RQCh. 7 - Prob. 17RQCh. 7 - Prob. 18RQCh. 7 - Prob. 19RQCh. 7 - When would you usually specify primary key...Ch. 7 - Prob. 21RQCh. 7 - Prob. 22RQCh. 7 - Prob. 23RQCh. 7 - Use SQL to make the following changes to the TAL...Ch. 7 - Create a view named ITEM_ORDER. It consists of the...Ch. 7 - Create a view named ORDER_TOTAL. It consists of...Ch. 7 - Write, but do not execute, the commands to grant...Ch. 7 - Prob. 5TDCh. 7 - Perform the following tasks: a. Create an index...Ch. 7 - Delete the index named ITEM_INDEX3.Ch. 7 - Write the commands to obtain the following...Ch. 7 - Prob. 9TDCh. 7 - Prob. 10TDCh. 7 - Toys Galore currently has a credit limit of 7,500....Ch. 7 - Use SQL to make the following changes to the...Ch. 7 - Create a view named RESERVATION_CUSTOMER. It...Ch. 7 - Create a view named TRIP_INVENTORY. It consists of...Ch. 7 - Write, but do not execute, the commands to grant...Ch. 7 - Prob. 5CATCh. 7 - Create the following indexes: a. Create an index...Ch. 7 - Prob. 7CATCh. 7 - Write the commands to obtain the following...Ch. 7 - Prob. 9CATCh. 7 - Ensure that the only legal values for the TYPE...Ch. 7 - Prob. 11CATCh. 7 - Use SQL to make the following changes to the...Ch. 7 - Create a view named CONDO_OWNERS. It consists of...Ch. 7 - Create a view named CONDO_FEES. It consists of two...Ch. 7 - Write, but do not execute, the commands to grant...Ch. 7 - Prob. 5SCGCh. 7 - Prob. 6SCGCh. 7 - Delete the OWNER_INDEX 3 index from the OWNER...Ch. 7 - Write the commands to obtain the following...Ch. 7 - Prob. 9SCGCh. 7 - Ensure that the only legal values for the BDRMS...Ch. 7 - Prob. 11SCG
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- Create a view named CONDO_OWNERS. It consists of the location number, unit number, square footage, bedrooms, baths, condo fee, and owners last name for every condo inwhich the number of bedrooms is three. a. Write and execute the CREATE VIEW command to create the CONDO_OWNERSview. b. Write and execute the command to retrieve the location number, unit number,condo fee, square footage, and owners last name for every condo in theCONDO_OWNERS view with a condo fee of less than 500. c. Write and execute the query that the DBMS actually executes. d. Does updating the database through this view create any problems? If so, what arethey? If not, why not?arrow_forwardWhich of the following commands drops any columns marked as unused from the SECUSTOMERORDERS table? DROP COLUMN FROM secustomerorders WHERE column_status = UNUSED ALTER TABLE secustomerorders DROP UNUSED COLUMNS; ALTER TABLE secustomerorders DROP (unused); DROP UNUSED COLUMNS;arrow_forwardTask 7: Create a view named MONTHLY_RENTS. It consists of three columns: the first is the number of bedrooms, the second is the average square feet, and the third is the average monthly rent for all properties in the PROPERTY table that have that number of bedrooms. Use BEDROOMS, AVG_SQUARE_FEET, and AVG_MONTHLY_RENT as the column names. Group and order the rows by number of bedrooms. Task 8: Write and execute the command to retrieve the average square footage and average monthly rent for each property for which the average monthly rent is greater than $1,400. Task 9: Without using the MONTHLY_RENTS VIEW, write and execute the command to retrieve the average square footage and average monthly rent for each property for which the average monthly rent is less than $1,400.arrow_forward
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- Which of the following statements can be used to display data using the view called "VIEW_PAYE_Kenya"? a.SELECT * FROM VIEW_PAYE_Kenya; b.CALL VIEW_PAYE_Kenya();arrow_forwardCreate a VIEW named MAJOR_CUSTOMER. It consists of the customer ID, first name, last name, balance, credit limit, and rep ID for every customer whose credit limit is $500 or less.arrow_forwardCreate a view named ORDER_TOTAL. It consists of the order number and order total for each order currently on file. (The order total is the sum of the number of units ordered multiplied by the quoted price on each order line for each order.) Sort the rows by order number. Use TOTAL_AMOUNT as the name for the order total. a.Write and execute the CREATE VIEW command to create the ORDER_TOTAL view. b.Write and execute the command to retrieve the order number and order total for only those orders totaling more than $500. c.Write and execute the query that the DBMS actually executes. d.Does updating the database through this view create any problems? If so, what are they? If not, why not?arrow_forward
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