Something like this?

http://www.web2py.com/books/default/chapter/29/06/the-database-abstraction-layer#sum--avg--min--max-and-len

sum = db(db.product.type=='large').select(sum).first()[sum]

count = db(db.product.type=='large').count()


On Friday, April 20, 2018 at 12:35:22 PM UTC-7, Ayron Rangel wrote:
>
>
> I am developing an Inventory Control and am having difficulty calculating 
> the sum of the values ​​of a given product type and calculating the 
> quantity of products with the same model
>

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