Fredy Santos
Data Analyst and SQL & Excel storytelling Specialist
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The Analyst’s Trap: Avoiding Common Pitfalls in Data 🌱
Learning the syntax of a coding language is only 20% of the job. The real challenge—and where most mistakes happen—is in the logic, the communication, and the strategy behind the data.
🔍 The Top 3 Mistakes to Watch For
In my...
📝 Ninth Publication: Efficiency vs. Repetition: The Logic of Stored Procedures 🌱
In data analysis, the most valuable resource isn't just the data itself—it’s time. Today, I’m exploring how moving from manual, repetitive queries to automated systems can transform a workflow from...
The Road Makes the Goal: Why I’m Celebrating the Small Wins 🌱
We often talk about the 'Senior Data Analyst' goal or the 'Big Contract' finish line. But lately, I’ve realized something powerful: The goal is just a destination, but the road is where the growth actually happens.
...
Why I Model Before I Code: The Blueprint for Data Integrity 📝
You wouldn't build a house without a blueprint, so why build a database without a model? Skipping the Relational Design phase is the fastest way to create 'Data Debt' that will haunt your business later.
🔍 The...
Is Your Database Running or Crawling? The Power of Indexing ⚡
Imagine walking into a library with 1 million books and no catalog. To find one specific title, you’d have to check every single shelf. That is exactly what your database does when you forget to create an Index.
🔍 The...
