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Explore practical guides, step-by-step masterclasses, and foundational definitions across AI, SQL, and data systems — written in plain, human English.
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How data moves from source systems to a dashboard: the four stages of a data pipeline
Inherited a broken dashboard number? Map data from sources through land, transform, and serve so you can debug the path, not the logos. Part 1 of How data…
How to turn a business goal into a metric you can track
Most metric fights are unfinished goal conversations in disguise. Walk the chain from objective to behavior to measure to target so your next KPI becomes a decision tool,…
How to choose the right chart for your question
Pick the chart for the question, not the template gallery. Use comparison, trend, composition, and distribution on purpose, plus a short never-do-this list for pies, 3D effects, and…
How to make a Custom GPT in ChatGPT for a task you do again and again
Part 1 of the Custom GPTs tutorial. Build one simple GPT for a repeating job: clear instructions, no actions yet, non-secret knowledge only, and a Preview test set…
How to use Claude Cowork on folders, documents, and spreadsheets
Part 3 of Claude Cowork tutorial. Work folders, docs, and sheets with a clear recipe: goal, inputs, constraints, format, and done check. Turn receipts into expense workbooks, notes…
