Migrate runs the migrations on the provided DB using the provided table to track them.

NewBackend returns a new Backend with a product.Repository and a price.Repository included.

NewPriceRepository returns an implementation of price.Repository.

NewProductRepository returns an implementation of product.Repository.

Backend is the MySQL implementation of the costestimation.Backend, using repositories that connect to a MySQL database.

PriceRepository implements the price.Repository.

ProductRepository implements the product.Repository.

Where represents the parts of a SQL WHERE clause.