Programming with Microsoft Visual Basic 2017
8th Edition
ISBN: 9781337102124
Author: Diane Zak
Publisher: Cengage Learning
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Chapter 12, Problem 3RQ
Program Description Answer
The statement to select and to sort the records in descending order by the field SSN from the table PayInfo is SELECT SSN FROM PayInfo ORDER BY SSN DESC.
Hence, the correct answer is option “B”.
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Problem 26
Create a MySQL trigger named trg_updatecustbalance to update the CUST_BALANCE in the CUST_MYSQL table when a new invoice record is entered. (Assume that the sale is a credit sale.) Whatever value appears in the INV_AMOUNT column of the new invoice should be added to the customer’s balance. Test the trigger using the following new INV_MYSQL record, which would add 225.40 to the balance of customer 2001:
3)
Create a SQL statement/s to Add/insert the following records in the CLIENTS table:
CLIENTS
CID
CName
Gender
Address
Contact
CType
1521
Ahmed Said
Male
SLL
92214561
Old
1522
Salma Mohammed
Female
MCT
92384792
New
1523
Faiza Ahmed
Female
SLL
97451382
Old
1524
Noaman Said
Male
NZW
New
using postgresql:
Write a trigger that will be activated when a new customer is added to the Customers table and that verifies that the ID of the new record does not yet exist in the table. If it does, the request shall be rejected.
Show what happens when a record with an existing ID is attempted to be added to the Customer table to verify that your trigger is working properly.
Customers table columns: id, first name, last name, email
Chapter 12 Solutions
Programming with Microsoft Visual Basic 2017
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