.xlsx (Movimientos, Campañas, Referencias, ClientesContactados_PDV_*) │ EXTRACT (Polars + motor calamine vía fastexcel) TRANSFORM (Polars: tipos, nulos, reglas de negocio) LOAD (psycopg2 COPY → ...
AI coding assistants are strongly encouraged throughout the course. We recommend opencode (no credit card needed), but any agent works: Claude Code, GitHub Copilot, Windsurf Cascade, Codex, etc.
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