Re: Using count on a join, group by required?

Hi,Please help me solving this problem. I appreciate..Thankyou.

Create the following table and insert few arbitrary records.
Product (product_id, product_name, supplier_name, quantity, price_per_unit)
You are required to create PL/SQL package that achieves the following
functionalities:

•    Obtaining the product supplier name by using the product_id
•    Changing the price_per_unit by using the product_id
•    When changing the price of the product, you have to have PL/SQL code that
keeps the history of the prices. For this functionality you need to create
audit table: product_audit(product_id, old_price, new_price, date_of_change)
•    Updating the quantity by using the product_id
•    Get warning when the product level of stock (quantity) goes below certain
threshold (e.g. 10)

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