Tutorials

Donut Chart - Categories

Tutorial (Tableau): Creating Donut Charts

Understanding and presenting complex data intuitively is crucial for a data analyst. Donut Charts offer a visually appealing way to represent part-whole relationships in our data. This short tutorial will examine the various steps required to create them with Tableau.

Tableau
Tutorial (SQL): GROUP BY, WHERE e HAVING

Tutorial (SQL): When to use GROUP BY, WHERE, and HAVING

This guide provides an intuitive introduction to the three essential SQL clauses for data aggregation: GROUP BY, WHERE and HAVING. The topic is also helpful for those preparing for job interviews in data analysis or software development.

SQL PostgreSQL
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