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Re: Need help on query which show total sum of result incorrect
Posted by: Peter Brawley
Date: November 28, 2017 11:01PM

The query looks baroque yet seems also to be missing some basic elements of shopping order processing. Unfortunately your description of the requirement confuses me further.

What I can glean from what you write is that you have cart_items which link to purchase_orders on id_cart and to products on id_product, and you want a sum of what the user has in her cart.

The missing elements are prices (surely you want more than a count of items bought---don't you want qty*price for each item, and the sum?) and inventory checks (otherwise how do you ensure you can fill the order?). Nor do I understand how the orders table already has a row linking to the customer's cart ID. Nor do I understand why the orders table is called purchase_orders, which are usually not generated from shopping carts.

So we need a clearer account of what's needed, and let's see the result of Show Create Table for cart_items, products and purchase_orders tables.

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Re: Need help on query which show total sum of result incorrect
November 28, 2017 11:01PM

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