Asumsikan bahwa Anda berencana membuat sistem point-of-sale (POS) yang akan memiliki fitur berikut di MongoDB
db.inventory.insert({"_id":"600a9cfcd5ec99008256c596","item":"iPhone-X phone","price":45000,"quantity":49,"creator":{"$ref":"sale","$id":"600a997bd5ec99008256c584","$db":"test"}})
Splendid Sandpiper