Jeferson Marques – Medium

Jeferson Marques

Jeferson Marques

Unveiling Statistics: First Reading

Apr 26

Unveiling Statistics: First Reading

Apr 26

Jeferson Marques

Predicting with Regression in Python: A Simple Guide

Imagine you have a Spotify playlist full of rock songs. Each song has different features like duration, loudness, tempo, and more. It would…

Mar 11

Predicting with Regression in Python: A Simple Guide

Mar 11

Jeferson Marques

Exploring Python Syntax: Understanding Variables, Keywords, Operators, Expressions, Functions…

As someone deeply passionate about programming and fascinated by the elegance of Python syntax, I find joy in delving into its various…

Feb 26

Exploring Python Syntax: Understanding Variables, Keywords, Operators, Expressions, Functions…

Feb 26

Jeferson Marques
in
Dev Genius

Exploring Common Table Expressions (CTEs) and Subqueries in SQL: A Comparative Analysis

As a data enthusiast and SQL aficionado, I’ve often found myself immersed in the world of database querying, constantly exploring different…

Feb 15

Exploring Common Table Expressions (CTEs) and Subqueries in SQL: A Comparative Analysis

Feb 15

Jeferson Marques

Resolving Date Hierarchy Issues in Power BI with MySQL Data

Power BI is a powerful tool for data visualization and analysis, but users may encounter challenges when dealing with date hierarchies. In…

Jan 24

Resolving Date Hierarchy Issues in Power BI with MySQL Data

Jan 24

Jeferson Marques

Data Visualization: Crafting Stories with Data

In today’s data-driven world, the ability to effectively convey insights from complex datasets is a highly sought-after skill. Data…

Sep 23, 2023

Data Visualization: Crafting Stories with Data

Sep 23, 2023

Jeferson Marques

Leveraging Subqueries in SQL: Enhancing Data Aggregation with CASE and HAVING

Structured Query Language (SQL) is the backbone of data manipulation and retrieval in relational databases. Subqueries, often referred to…

Sep 4, 2023

Leveraging Subqueries in SQL: Enhancing Data Aggregation with CASE and HAVING

Sep 4, 2023

Jeferson Marques

Understanding Database, Data Warehouse, and Data Lake: Differences, Advantages, and Transitions

In today’s data-driven world, effective data management is paramount for businesses seeking to gain insights, make informed decisions, and…

Sep 1, 2023

Understanding Database, Data Warehouse, and Data Lake: Differences, Advantages, and Transitions

Sep 1, 2023

Jeferson Marques

The Significance of Data Cleaning in Data Analytics: Leveraging Google Sheets and BigQuery

In the realm of data analytics, the importance of clean and accurate data cannot be overstated. Raw data rarely arrives in pristine…

Aug 24, 2023

The Significance of Data Cleaning in Data Analytics: Leveraging Google Sheets and BigQuery

Aug 24, 2023

Jeferson Marques

Transitioning from Spreadsheets to Relational Databases: Making Informed Choices for Data Analysis

In the ever-evolving landscape of data analysis, the choice between working with spreadsheets or transitioning to a robust relational…

Aug 22, 2023

Transitioning from Spreadsheets to Relational Databases: Making Informed Choices for Data Analysis

Aug 22, 2023

Jeferson Marques

Jeferson Marques

I am a Data Analyst, and here I share a little about my constant learning, while also practicing my writing and English skills.

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