Database Mental Models

Database Mental Models is the foundational idea that spreadsheets, SQL tables, and dataframes all share the same core structure: rows, columns, and types. In Brevvie Python + AI — Section 3: Data, Polars & Pair Programming, this is the primary teaching goal.

Core pieces

• tables hold records
• rows represent individual records
• columns represent attributes
• each column has a dtype that constrains valid operations

Why it matters

The lesson teaches this mental model before deeper SQL or data-engineering topics so learners can transfer the same intuition across tools.