التضمين مقابل المرجعية

في هذا الدرس

decide where related data lives, based on access patterns.

الموضوعات المخطط لها

• Embed when data is read together, is owned by the parent, and stays bounded (an address inside an order).
• Reference when data is shared, large, changes on its own, or grows without limit (all reviews of a product).
• An unbounded array inside a document (reviews inside a product) is the classic mistake: documents grow, updates slow down, 16 MB limit.
• Copy small, stable fields (customer display name) into the document to avoid lookups; accept update cost.
• Do not copy a relational schema table by table.