I have this and it is not showing as correct: CREATE TRIGGER trg_updatecustbalance2 AFTER DELETE ON INV_MYSQL FOR EACH ROW UPDATE CUST_MYSQL SET CUST_BALANCE = CUST_BALANCE - OLD.INV_AMOUNT; DELETE FROM INV_MYSQL WHERE INV_NUM = 9006; SELECT * FROM INV_MYSQL;   Here is the question:   Write a trigger to update the CUST_BALANCE from CUST_MYSQL when an invoice is deleted from INV_MYSQL. Name the trigger trg_u

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
icon
Related questions
icon
Concept explainers
Question

I have this and it is not showing as correct:

CREATE TRIGGER trg_updatecustbalance2
AFTER DELETE
ON INV_MYSQL FOR EACH ROW
UPDATE CUST_MYSQL
SET CUST_BALANCE = CUST_BALANCE - OLD.INV_AMOUNT;
DELETE FROM INV_MYSQL
WHERE INV_NUM = 9006;
SELECT * FROM INV_MYSQL;
 
Here is the question:
 

Write a trigger to update the CUST_BALANCE from CUST_MYSQL when an invoice is deleted from INV_MYSQL. Name the trigger trg_updatecustbalance2.

(You should delete INV_NUM 9006 from INV_MYSQL to ensure your code is correct.)

FIGURE P8.16 CH08_SIMPLECO DATABASE TABLES
Database name: Ch08_SimpleCo
Table name: CUSTOMER
Table name: INVOICE
CUST NUM CUST_LNAME CUST_FNAME CUST_BALANCE
INV_NUM CUST_NUM INV_DATE INV_AMOUNT
1000 Smith
Jeanne
1050.11
8000
1000
23-Mar-16
235.89
1001 Ortega
Juan
840.92
8001
1001
23-Mar-16
312.82
8002
1001
30-Mar-16
528.10
12-Apr-16
23-Apr-16
8003
1000
194.78
8004
1000
619.44
Transcribed Image Text:FIGURE P8.16 CH08_SIMPLECO DATABASE TABLES Database name: Ch08_SimpleCo Table name: CUSTOMER Table name: INVOICE CUST NUM CUST_LNAME CUST_FNAME CUST_BALANCE INV_NUM CUST_NUM INV_DATE INV_AMOUNT 1000 Smith Jeanne 1050.11 8000 1000 23-Mar-16 235.89 1001 Ortega Juan 840.92 8001 1001 23-Mar-16 312.82 8002 1001 30-Mar-16 528.10 12-Apr-16 23-Apr-16 8003 1000 194.78 8004 1000 619.44
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Knowledge Booster
Query Syntax
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education