Database Schema: branch ( branch_name, branch_city, assets ) customer ( ID, customer_name, customer_street, customer_city ) loan ( loan_number, branch_name, amount ) borrower ( ID, loan_number ) account ( account_number, branch_name, balance ) depositor ( ID, account_number ) Write a (postgresql) "trigger function" and "create a trigger" to carry out the following action: On delete of an account, for each customer-owner of the account, check if the owner has any remaining accounts, and if she does not, delete her from the depositor relation.

Database Schema: branch ( branch_name, branch_city, assets ) customer ( ID, customer_name, customer_street, customer_city ) loan ( loan_number, branch_name, amount ) borrower ( ID, loan_number ) account ( account_number, branch_name, balance ) depositor ( ID, account_number ) Write a (postgresql) "trigger function" and "create a trigger" to carry out the following action: On delete of an account, for each customer-owner of the account, check if the owner has any remaining accounts, and if she does not, delete her from the depositor relation.

COMPREHENSIVE MICROSOFT OFFICE 365 EXCE

1st Edition

ISBN:9780357392676

Author:FREUND, Steven

Publisher:FREUND, Steven

Chapter6: Creating, Sorting, And Querying A Table

Section: Chapter Questions

Problem 13EYK

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