Category: Analytics

Why customer_id beats matching on names. Primary keys, foreign keys, one-to-many joins, and sheet habits that keep IDs stable.

Headers once, one value per cell, tidy vs wide. Turn pretty spreadsheet layouts into analysis tables that filter, join, and export without drama.

Spreadsheets start handy and can end as multiplayer systems of record with no owner. Learn the liability ladder, red flags, and Monday fixes before you trust a file…

Survivorship, cherry-picking, averages of averages, wrong grain, and lonely numbers. Spot the traps that make clean charts support bad decisions.

Stop starting with the warehouse. Use an eight-field one-page analytics brief to turn vague stakeholder asks into decision-ready work before you write a single query.