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A_Create in PL/SQL a stored procedure called 'Del_Details' to delete the record of orderedProduct table for which it receives as input the order number (orderNO) and the product number (productNO).  B_ Create in PL/SQL a stored Function called 'productPerOrder' to return the number of products placed for any order its number is given as input. C_ Write a Trigger called ‘changeCustomer_Category’. This trigger should be invoked before any update of customer balance in customer table. Its job is to modify the category of a customer from B2 to B1 and from C2 to C1 when a customer's balance status drops below a certain threshold (-10000).

A_Create in PL/SQL a stored procedure called 'Del_Details' to delete the record of orderedProduct table for which it receives as input the order number (orderNO) and the product number (productNO).  B_ Create in PL/SQL a stored Function called 'productPerOrder' to return the number of products placed for any order its number is given as input. C_ Write a Trigger called ‘changeCustomer_Category’. This trigger should be invoked before any update of customer balance in customer table. Its job is to modify the category of a customer from B2 to B1 and from C2 to C1 when a customer's balance status drops below a certain threshold (-10000).

A Guide to SQL
A Guide to SQL
9th Edition
ISBN:9781111527273
Author:Philip J. Pratt
Publisher:Philip J. Pratt
Chapter8: Sql Functions And Procedures
Section: Chapter Questions
Problem 6CAT
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A_Create in PL/SQL a stored procedure called 'Del_Details' to delete the record of
orderedProduct table for which it receives as input the order number (orderNO) and the
product number (productNO). 
B_ Create in PL/SQL a stored Function called 'productPerOrder' to return the number of
products placed for any order its number is given as input.
C_ Write a Trigger called ‘changeCustomer_Category’. This trigger should be invoked before
any update of customer balance in customer table. Its job is to modify the category of a
customer from B2 to B1 and from C2 to C1 when a customer's balance status drops below
a certain threshold (-10000).

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