A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Chapter 7, Problem 9CAT
Program Plan Intro
ALTER TABLE Statement:
- “ALTER TABLE” statement comes under Data Definition Language.
- It is used to modify column, add constraints, add column(s), drop column, rename column name and table name, drop constraints, and so on.
Syntax:
The Syntax to drop constraint is as follows:
ALTER TABLE table_Name ADD CONSTRAINT constraint_Name;
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Mark the Category column of the BOOK_PRICING table as unused. Verify that the column is no longer available.
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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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- Add a new row in the ORDERS table with the following data: Order# = 1022, Customer# = 2000, and Order date = August 6, 2009. Describe the error raised and what caused the error.arrow_forwardAdd a new row in the ORDERS table with the following data: Order# = 1023 and Customer# = 1009. Describe the error raised and what caused the error.arrow_forwardTruncate the BOOK_PRICING table, and then verify that the table still exists but no longer contains any data.arrow_forward
- Mark the BOOK_PRICING table's Category field as empty. Check to see whether the column is no longer accessible.arrow_forwardAdd a column named ON_HAND_VALUE to the NONCAT table. The on-hand value is a seven-digit number with two decimal places that represents the product of the number of units on hand and the price. Then set all values of ON_HAND_VALUE to ON_HAND * PRICE.arrow_forwardAdd a column named ON_HAND_VALUE to the NONCAT table. The on-hand value is a seven-digit number with two decimal places that represent the product of the number of units on hand and the price. Then set all values of ON_HAND_VALUE to ON_HAND * PRICE.arrow_forward
- Add two columns to the EMPLOYEES table. One column, named EmpDate, contains the date of employment for each employee, and its default value should be the system date. The second column, named EndDate, contains employees’ date of terminationarrow_forwardUsing software.subscriptions table, pull all columns for subscriptions that have been cancelled.arrow_forwardInsert a row into the LARGE_PROPERTY table for a new property. The office number is 1, The address is 2643 Lugsi Dr., The number of bedrooms is 3, The number of floors is 2, The monthly rent is $775, The owner number is MA111. Make sure to include the period (.) in the address.arrow_forward
- Select all rows from the Orders table where the CustomerID is greater than 300.arrow_forwardModify the CUSTOMER table to include the customer’s date of birth (CUST_DOB), which should store date dataarrow_forwardUsing the EMPLOYEE table that already exists, use a subquery to insert the remaining rows from the EMPLOYEE table into the EMP_1 table. Remember, your subquery should only retrieve the columns needed for the EMP_1 table and only the employees shown in the figure.arrow_forward
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