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1.1.1. What Shape Is Your Data?

💡 First Principle: Data shape determines storage options. You cannot force mismatched shapes—a square peg won't fit a round hole. Asking "what shape?" before "which service?" eliminates 70% of wrong answers immediately.

ShapeCharacteristicsStorage Options
StructuredFixed schema, rows/columns, relationshipsSQL databases (Azure SQL, PostgreSQL)
Semi-structuredFlexible schema, self-describing (JSON/XML)Document stores (Cosmos DB), Blob Storage
UnstructuredNo schema, binary (images, video, audio)Object storage (Blob, Data Lake)

Reasoning Tool: When a question describes data, immediately classify its shape. If it mentions "tables," "columns," or "relationships"—structured. If it mentions "JSON," "varying fields," or "documents"—semi-structured. If it mentions "images," "video," or "binary files"—unstructured.

Alvin Varughese
Written byAlvin Varughese
Founder15 professional certifications