A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Chapter 6, Problem 9RQ
What is the format of the SET clause that changes the value in a column to null in an UPDATE command?
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Task 8: Create the UPDATE_INVOICE procedure to change the date of the invoice whose number is stored in I_INVOICE_NUM to the date currently found in I_INVOICE_DATE.
What is the difference between the delete and drop table commands?
1) Add the following record to the OWNER table:
INSERT INTO OWNER VALUES('SA100', 'Sam', 'Afyouni', '100 Hello St', 'Anytown', 'MA', '55555');
2) Create the UPD_OWNER_LAST_NAMEprocedure to change the last name of the owner whose number is stored in I_OWNER_NUM (provided as a parameter) to the value currently found in I_LAST_NAME.
Chapter 6 Solutions
A Guide to SQL
Ch. 6 - Prob. 1RQCh. 6 - Which command and clause adds an individual row to...Ch. 6 - How do you add data from an existing table to...Ch. 6 - Prob. 4RQCh. 6 - Which command removes rows from a table?Ch. 6 - Which command makes updates permanent?Ch. 6 - Which command reverses updates? Which updates are...Ch. 6 - Prob. 8RQCh. 6 - What is the format of the SET clause that changes...Ch. 6 - Which command and clause adds a column to an...
Ch. 6 - Prob. 11RQCh. 6 - Which command deletes a table and all its data?Ch. 6 - Prob. 13RQCh. 6 - Prob. 1TDCh. 6 - Prob. 2TDCh. 6 - Prob. 3TDCh. 6 - Prob. 4TDCh. 6 - Prob. 5TDCh. 6 - Prob. 6TDCh. 6 - In the NONGAME table, change the category for item...Ch. 6 - Prob. 8TDCh. 6 - Prob. 9TDCh. 6 - Prob. 10TDCh. 6 - Prob. 11TDCh. 6 - Use SQL to make the following changes to the...Ch. 6 - Prob. 2CATCh. 6 - Prob. 3CATCh. 6 - Prob. 4CATCh. 6 - Prob. 5CATCh. 6 - Prob. 6CATCh. 6 - Add to the PADDLING table a new character column...Ch. 6 - Prob. 8CATCh. 6 - Prob. 9CATCh. 6 - Prob. 10CATCh. 6 - Prob. 11CATCh. 6 - Prob. 12CATCh. 6 - Use SQL to make the following changes to the...Ch. 6 - Prob. 2SCGCh. 6 - Prob. 3SCGCh. 6 - Prob. 4SCGCh. 6 - Prob. 5SCGCh. 6 - Prob. 6SCGCh. 6 - Prob. 7SCGCh. 6 - Prob. 8SCGCh. 6 - Prob. 9SCGCh. 6 - Prob. 10SCGCh. 6 - Prob. 11SCGCh. 6 - Prob. 12SCG
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- The SERVICE_REQUEST table uses the CHAR data type for the DESCRIPTION and STATUS fields. Is there an alternate data type that could be used to store the values in these fields? Justify your reason for choosing an alternate data type or for leaving the data type as CHAR.arrow_forwardWhich clause is used to change a column in a table? a. SET b. MODIFY c. ALTER d. UPDATEarrow_forwardTask 8: Create the UPDATE_INVOICE procedure to change the date of the invoice whose number is stored in I_INVOICE_NUM to the date currently found in I_INVOICE_DATE. Expected Results INVOICE_NUM INVOICE_DATE CUST_ID 00001 2021-11-21 294arrow_forward
- 10arrow_forward4. Write a SELECT statement that selects all of the columns for the catalog view that returns information about foreign keys. How many foreign keys are defined in the AP database?arrow_forwardThe Driver Relationship team realized that maintaining driver IDs is difficult and requested an automatic way of incrementing the value when a new driver is added. You need to make the changes on the table to automatically increment the DRIVER_ID. After the change, you need to insert the following driver: First Name: Nursin Last Name: Yilmaz Driving License ID: 4141447 Start Date: 2021-12-28 Driving License Checked: True Rating: 4.0arrow_forward
- The Developers team also wants you to ensure that emails are converted to lowercase after an update operation. Currently, new insertions are guaranteed to have lowercase emails, but there is no such guarantee for legacy emails. Therefore, the team wants to ensure that emails are being retained in a lowercase irrespective of any changes in the database. Create a new TRIGGER called email_update for the USERS table that runs before an UPDATE operation. Task Create a TRIGGER to run on the USERS table before any UPDATE operation.arrow_forwardWrite a SELECT statement that returns all rows with salary, last name, street address and ZIP code (SALARY, LAST_NAME, STREET, ZIP_CODE) from the EMPLOYEE and ADDRESS tables, sorted by SALARY from largest to smallest. STREET and ZIP_CODE are in the ADDRESS table, while the other fields are in the EMPLOYEE table. The common key is EMPLOYEE_ID.arrow_forwardCreate a trigger named tInstructors_UPDATE that checks the new value for the AnnualSalary column of the Instructors table. This trigger should raise an appropriate error if the annual salary is greater than 120,000 or less than 0.arrow_forward
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