Geo Sentry @Geo_sentry

Géographe, Guide de Tourism, Data Scientistes Joined August 2021

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Geo Sentry @Geo_sentry

4 months ago

Quick Summary

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Geo Sentry @Geo_sentry

4 months ago

Sous-requête dans la clause FROM

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Geo Sentry @Geo_sentry

5 months ago

Criterion DISTINCT GROUP BY

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KEYS: SUM(),COUNT(),AVG() IN SQL If each value in the column is a coin, SUM() gives you the total amount of money, while COUNT() tells you how many coins you have, and AVG() gives you the average value of a coin.

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Geo Sentry @Geo_sentry

5 months ago

Filtering Data in SQL

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Geo Sentry @Geo_sentry

5 months ago

Comparative Analysis: ORDER BY + LIMIT 1 vs MAX/MIN in SQL

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Geo Sentry @Geo_sentry

5 months ago

Python Concepts

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Geo Sentry @Geo_sentry

5 months ago

4 types of visualization and their main uses

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Geo Sentry @Geo_sentry

5 months ago

DataViz Storytelling A visualization without annotations is like a museum without labels: beautiful but incomprehensible.

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Geo Sentry @Geo_sentry

5 months ago

A Guided Tour Through a Data Museum 🖼️ Filters/Parameters = Personalized Tour 🗺️ You select a gallery (filter "Europe") to focus on a region. Titles/Fonts = Museum Signage 🚏 Useful—but no substitute for targeted insights (tooltips/annotations).

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Geo Sentry @Geo_sentry

5 months ago

A Guided Tour Through a Data Museum 🖼️ Annotations = Curatorial Labels 🖋️ A plaque beneath a piece (annotation) clarifies: "This red trend = sector crisis (2020)." → Highlights what matters.

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Geo Sentry @Geo_sentry

5 months ago

A Guided Tour Through a Data Museum 🖼️📷The Artworks (Charts): Tooltips = Interactive Audio Guide 🎧 As you approach (hover), the audio guide whispers: *"This peak in 2023 reflects +30% sales from Campaign X."* → Contextual details on demand.

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Geo Sentry @Geo_sentry

5 months ago

A Guided Tour Through a Data Museum 🖼️🔍 The Artworks (Charts): Line charts, bars, scatter plots = Exhibited paintings and sculptures.

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Geo Sentry @Geo_sentry

5 months ago

Data Viz When comparing teams (or categories), the Bar Chart stands as your scoreboard. Other charts serve as analytical tools—but never as clear rankings.

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Geo Sentry @Geo_sentry

5 months ago

Why the Bar Chart is the undisputed MVP of data viz? 🏆📊 • Clear as a podium finish—bar height = gold, silver, bronze. 🥇🥈🥉 • Universal—Even your grandma knows who’s winning. 👵✅ • Wins 80% of matchups (categories vs. values). ⚡