The Blog

Practical data & AI, for work.

Short, useful articles on the tools that actually move the needle — Excel, SQL, Power BI, Tableau, Python and AI. No fluff, no theory for its own sake.

Data storytelling · 6 min read

How charts lie — and how to catch them

The same numbers can be drawn to tell opposite stories. Four common ways charts mislead — and the quick check that catches each one.

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SQL · 5 min read

Ask your database a question: SQL in 5 minutes

You don't need to be a programmer to get answers straight from a database. The whole idea of SQL — SELECT, WHERE, GROUP BY and JOIN — in plain English.

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Excel · 5 min read

The Excel formula that replaces an hour of copy-paste

If you still match data between two spreadsheets by hand, XLOOKUP will give you that hour back — every week. Here's how it works, in plain English.

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