Get these two tables right and your whole warehouse makes sense. Get them wrong and nothing adds up. A beginner's guide with real data and the one question that matters: the grain.
Read MoreOnce your data is clean, how do you arrange it for analysis? Meet the two classic layouts — with real tables, real SQL, and a clear rule for which to pick.
Read MoreSame three steps, different order — and that small switch reshaped how modern data teams work. Explained with a kitchen, no jargon.
Read MoreFour places your data can live, four very different jobs. Explained with a restaurant's pantry, fridge, and storage yard — no jargon required.
Read MoreTwo ugly acronyms, one simple idea: the systems that run a business vs. the systems that help you understand it. Explained with a supermarket.
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