Data with Charles
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Hi, I'm Charles.

I am a Data Analyst interested in the Environment, Hospitality, Tech, Education, and Science.

I enjoying working with Python, Excel, Power BI and and SQL.

I bake in my spare time.

Man working on a laptop

Back to Basics - SQL 06 - WHERE e HAVING

Charles De Barros, Dec 09, 2025, Back to basics Sql

Filtragem SQL com WHERE e HAVING (Com diagramas, ilustrações e desafios adicionais) Índice Visão Geral Entendendo WHERE O que é Agregação? HAVING filtra grupos agregados WHERE vs HAVING Quando Usar...

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Back to Basics - SQL 06 - WHERE and HAVING

Charles De Barros, Dec 09, 2025, Back to basics Sql

SQL filtering with WHERE and HAVING (With diagrams, ilustrationsn and practice challenges) Table of Contents SQL Filtering with WHERE and HAVING Understanding WHERE What Is Aggregation? HAVING Filters Aggregated Groups...

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Back to Basics - SQL 05 - ORDER BY and GROUP BY

Charles De Barros, Sep 16, 2025, Back to basics Sql

ORDER BY vs GROUP BY in SQL: A Complete Guide with Examples Table of Contents Introduction What is ORDER BY? Basic Syntax Beginner Example Intermediate Example Advanced Example What is...

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Back to Basics - SQL 05 - ORDER BY e GROUP BY

Charles De Barros, Sep 02, 2025, Back to basics Sql

ORDER BY vs GROUP BY no SQL: Um Guia Completo com Exemplos Índice Introdução O que é ORDER BY? Sintaxe Básica Exemplo para Iniciantes Exemplo Intermediário Exemplo Avançado O que...

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Back to Basics - SQL 04 - The ORDER BY keyword

Charles De Barros, Sep 02, 2025, Back to basics Sql

Photo by Markus Spiske on Unsplash Mastering SQL ORDER BY: Sorting Data Effectively When working with relational databases, retrieving data is only half the battle. Equally important is presenting that...

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Back to Basics - SQL 04 - A cláusula ordenadora ORDER BY

Charles De Barros, Sep 02, 2025, Back to basics Sql

Foto cortesia de Markus Spiske no Unsplash Dominando o ORDER BY em SQL: Classificando Dados com Eficácia Ao trabalhar com bancos de dados relacionais, recuperar dados é apenas metade da...

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