erDiagram
    categories {
        UUID id PK "gen_random_uuid()"
        VARCHAR category_name
        TEXT description
    }

    suppliers {
        UUID id PK "gen_random_uuid()"
        VARCHAR company_name
        VARCHAR contact_name
        TEXT address
        VARCHAR phone
        VARCHAR email
    }

    products {
        UUID id PK
        VARCHAR reference
        VARCHAR product_name
        DECIMAL unit_price
        INT stock_quantity
        UUID category_id FK
    }

    product_suppliers {
        UUID product_id PK,FK
        UUID supplier_id PK,FK
    }

    customers {
        UUID id PK "gen_random_uuid()"
        VARCHAR last_name
        VARCHAR first_name
        TEXT address
        VARCHAR phone
        VARCHAR email
    }

    orders {
        UUID id PK "gen_random_uuid()"
        UUID customer_id FK
        DATETIME order_date
        VARCHAR status
    }

    order_details {
        UUID order_id PK,FK
        UUID product_id PK,FK
        INT quantity
        DECIMAL unit_price
    }

    categories ||--o{ products : has
    products ||--o{ product_suppliers : has
    suppliers ||--o{ product_suppliers : supplies
    customers ||--o{ orders : places
    orders ||--o{ order_details : contains
    products ||--o{ order_details : "ordered in"