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Editorial Team
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Asked: 2026-06-18T08:38:33+00:00

For example, if I have two tables: Customer and Product and I need to

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For example, if I have two tables: Customer and Product and I need to map customers to products (many-to-many). So I need a third (join) table, which will contain CustomerId and ProductId. Is DAO responsible for inserting records into the third (join) table?

P.S. For now I have CustomerDAO and ProductDAO. Mapping customers to products handled by a service-layer.

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1 Answer

  1. Editorial Team

    Yes, your DAO can implement methods like

    • updateProduct(CustomerId)
    • updateCustomer(ProductId)
    • findCustomerByProduct(productId)
    • findProductsByCustomer(customerId)
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