SELECT o.order_number, p.product_name, i.quantity, i.unit FROM [ order ] o JOIN order_item i ON o.id = i.order_id JOIN product p ON p.id = i.product_id ORDER BY o.order_number
MongoDB is a free and open-source cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with schemas.Learn more at MongoDB
PostgreSQL is one of the world's most popular open source relational databases.Learn more at PostgreSQL - Warehouse
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