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Create an Oracle sequence named CUST_NUM_SEQ to generate values for customer numbers. The sequence should start with the value 2000. Create an Oracle sequence named INV_NUM_SEQ to generate values for invoice numbers. The sequence should start with the value 9000. Create a trigger named trg_updatecustbalance to update the CUST_BALANCE in the CUSTOMER 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 INVOICE record, which would add 225.40 to the balance of customer 1001: 8005, 1001, '27-APR-18', 225.40

Create an Oracle sequence named CUST_NUM_SEQ to generate values for customer numbers. The sequence should start with the value 2000. Create an Oracle sequence named INV_NUM_SEQ to generate values for invoice numbers. The sequence should start with the value 9000. Create a trigger named trg_updatecustbalance to update the CUST_BALANCE in the CUSTOMER 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 INVOICE record, which would add 225.40 to the balance of customer 1001: 8005, 1001, '27-APR-18', 225.40

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Create an Oracle sequence named CUST_NUM_SEQ to generate values for customer

numbers. The sequence should start with the value 2000.

Create an Oracle sequence named INV_NUM_SEQ to generate values for invoice

numbers. The sequence should start with the value 9000.

Create a trigger named trg_updatecustbalance to update the CUST_BALANCE in

the CUSTOMER 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 INVOICE record, which would add 225.40 to the balance of customer

1001:

8005, 1001, '27-APR-18', 225.40

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