Tech Skills
Data Analytics & Business Intelligence
Excel, SQL, Power BI, Tableau — turn raw data into business decisions
Skills in this topic
7 skills — Sign in to track your progress
Data Literacy
beginner
Write SELECT queries with JOIN and GROUP BY
Excel & Spreadsheets
beginner
Build a dynamic dashboard with pivot tables and slicers
SQL Analytics
intermediate
Write window functions (ROW_NUMBER, LAG, LEAD)
BI Tools
intermediate
Build an interactive dashboard from a SQL source
Python for Data
intermediate
Clean and transform a messy dataset with pandas
Data Storytelling
intermediate
Build a stakeholder dashboard with a narrative structure
ML for Analytics
advanced
Build a churn prediction model
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
The Best Free Elevation Datasets in 2026 (And How to Access Them in Python)
Compare the top open DEMs, understand their strengths, and learn how to download and analyze terrain data using Python. Continue reading on Tierra Insights »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Exploratory Data Analysis (EDA) with Python: A Hands-On Guide
Exploratory Data Analysis (EDA) is an essential first step in any data analysis project. It helps you understand your data, identify… Continue reading on Medium
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Exploratory Data Analysis (EDA) with Python: A Hands-On Guide
Exploratory Data Analysis (EDA) is an essential first step in any data analysis project. It helps you understand your data, identify… Continue reading on Medium
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
The Semantic Layer Market Has a Label Problem. This Guide Fixes That.
Everyone claims a semantic layer now. BI tools claim it. Data warehouses claim it. Virtualization platforms, metrics frameworks… Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Can Students Without IT Background Enter Data Science Careers in Mangalore?
The simple answer is yes. A career in data science is no longer limited to computer science or IT graduates. Students from commerce… Continue reading on Medium
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
From Messy Data to Clear Insights: My First End-to-End EDA Walkthrough
I had a CSV file, 24 rows of student data, and no real idea what story it was hiding. A few hours later, after fixing a junk value hiding… Continue reading on M
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
I Pointed DuckDB at 1.6 Billion NYC Taxi Rides — No Warehouse, No Backend, $0/Month
A one-page dashboard/report, that reads like an article, over every yellow cab, Uber and Lyft trip since 2020 — raw Parquet in, static… Continue reading on Medi
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Backtests Are Not Proof: How to Read Historical Market Patterns More Carefully
A practical guide to moving beyond seasonal clichés and analyzing market rules, sample sizes, and distributions. Continue reading on Medium »
Dev.to · Jitendra Devabhaktuni
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Your Clinical Database Is Lying to You (And You Already Know It)
There is a specific moment most clinical data engineers recognize immediately. You are three weeks...
Dev.to · circobit
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Pourquoi Votre Tableau Exporté Contient des Caractères Bizarres (Et Comment Corriger)
Vous exportez un tableau. Vous ouvrez le CSV. Au lieu de « José » vous voyez « José ». Au lieu de « €...
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
The Interval Is the Answer: Why Confidence Intervals Beat p-values (and How Almost Everyone Reads…
A p-value tells you whether to be surprised. A confidence interval tells you what to do. Here’s how to read intervals like a… Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Skill Gap Shock: What I Learned on Day 1 That Nobody Taught Me
The job description read like a dream. “Build ML models to drive business intelligence.” Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Data Analyst Career in 2026: Is It Still a Good Career Choice?
In 2026, almost every business is becoming a data-driven business. Whether it is banking, healthcare, retail, e-commerce, education… Continue reading on Medium
Dev.to · Joichiro Mitaka
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Why Is Only 40% of Your Data Compressed? The Tarball Trap and How to Escape It
The Uncompressed Elephant in the Room Open a shell on your primary storage array. Run du...
Dev.to · cleanstmt
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Why Bank Statement PDFs Convert to Excel with Merged Cells (And How to Fix It)
Why Bank Statement PDFs Convert to Excel with Merged Cells (And How to Fix It) If you've...
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Your Data Has a Shape, and It’s Trying to Tell You Who Made It
Probability distributions aren’t math trivia. They’re fingerprints of the process that generated your data, and reading them is how… Continue reading on Medium
Dev.to · ahmet gedik
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How I Query Millions of Video Rows with DuckDB Over Parquet Exports
How I run ad-hoc video analytics without a warehouse: export SQLite to partitioned Parquet, query it
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Why Placement Assistance Matters
Placement support helps learners successfully transition from training to employment. Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
10 Seaborn Visualization Techniques Every Data Analyst Should Know for Enterprise Reporting
Enterprise-ready Seaborn techniques for creating impactful, scalable, and insight-driven visual reports Continue reading on Medium »
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
10 Seaborn Visualization Techniques Every Data Analyst Should Know for Enterprise Reporting
Enterprise-ready Seaborn techniques for creating impactful, scalable, and insight-driven visual reports Continue reading on Medium »
Dev.to · EricMWaimiri
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Parametric vs Non-Parametric Statistical Tests
What Are They? Statistical tests fall into two broad categories: parametric and...
Medium · Machine Learning
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How to Write SQL Queries That Detect Unstable Join Filtering and Inconsistent Results
Query validation patterns that expose unstable joins and prevent inconsistent analytical outcomes Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How to Write SQL Queries That Detect Unstable Join Filtering and Inconsistent Results
Query validation patterns that expose unstable joins and prevent inconsistent analytical outcomes Continue reading on Medium »
Dev.to · L. Cordero
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Fable 5 Hype: Fangirling with Datasets to Build a Lakers Dashboard
This is the story of a for-fun project, Luka Fit Index that started with me typing "ai for fun?...
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How Mastering These 7 Data Structures Got Me a $138,500 Dev Job Offer
Hi everyone, I am Trends 24/7 and in this blog I want to share what actually happened during my last job search, not the polished version… Continue reading on M
Dev.to · Mark
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Modeling the Expected Value of a Sealed Card Box (and Where the Number Quietly Lies)
A friend messaged me a photo of a sealed booster box last month with one question: "worth it?" He'd...
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
SQL vs Pandas: The Ultimate Cheat Sheet
If you already know SQL, learning Pandas is less about learning something new and more about learning a new syntax for concepts you… Continue reading on Data Sc
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
SQL vs Pandas: The Ultimate Cheat Sheet
If you already know SQL, learning Pandas is less about learning something new and more about learning a new syntax for concepts you… Continue reading on Data Sc
Dev.to · Vadim Zabin
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How to Get Canadian Charity Data by API (2026)
Canada has about 85,000 registered charities, and the Canada Revenue Agency (CRA) publishes the whole...
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Imagine waking up one day only to discover your account has been suspended.
THE DOWNSIDE OF CENTRALISED STORAGE PLATFORMS Continue reading on Medium »
Dev.to · Aniket Abhishek Soni
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Your Hive Metastore Migration is a Ticking Time Bomb: Why Are You Still Using It?
Why I chose this topic: I’ve spent the last six months cleaning up the aftermath of "in-place"...
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Aynı Kaynak, Farklı Sonuç: Veri Zarflama Analizi’ni Gerçekten Anlamak
Girdilerin ve çıktıların homojen göründüğü bir pazarda, operasyonel performansı adil bir şekilde ölçmek modern yönetimin en büyük meydan… Continue reading on Fi
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Designing for Decisions
Why great analytics products fail long before launch Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Why Quant-First Strategies Blind Your AI and Your Business
We live in an era paralyzed by the illusion of objectivity. Look at any modern corporate boardroom, and you will see the same ritual… Continue reading on Bootca
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
What If We Discovered Alien Microbes On Mars?
What If We Discovered Alien Microbes On Mars? Continue reading on Medium »
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
pdfplumber — when you need to extract data from PDF. A primer and a skill.md
Who you gonna call when the PDF is the only source. Continue reading on Medium »
Medium · Machine Learning
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Exploratory Data Analysis: Asking Good Questions of Your Data
Before you build any model or draw any conclusion, you need to actually understand what you are looking at. This is how professionals do… Continue reading on Me
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Exploratory Data Analysis: Asking Good Questions of Your Data
Before you build any model or draw any conclusion, you need to actually understand what you are looking at. This is how professionals do… Continue reading on Me
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Exploratory Data Analysis: Asking Good Questions of Your Data
Before you build any model or draw any conclusion, you need to actually understand what you are looking at. This is how professionals do… Continue reading on Me
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
DuckDB Might Forever Change the Way I Work with Data: Here's Why…
Long story short: it helps you to query CSV, Parquet, and Pandas data with SQL directly from Python — without setting up a database server. Continue reading on
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Demystifying DolphinScheduler’s Plugin Mechanism: Extend Task Types & Data Sources with Ease
1. High-Level Architecture Overview Continue reading on CodeX »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Modeling in Migration Projects — Part 3 of 3: Power BI Semantic Modeling and Migration Execution
Part 1 built the blueprint — the demand inventory, legacy table triage, entity mapping, and the layer-stamped source-to-target map… Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Modeling in Migration Projects — Part 2 of 3: Database-End Modeling, the Complete Warehouse…
Part 1 built the blueprint: the demand inventory, the legacy table triage, the entity mapping, and the layer-stamped source-to-target map… Continue reading on M
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Can You Solve This MIT Probability Puzzle?
The figure shows a 4-digit password lock. Each gate has the digits 0–9. Continue reading on Math Mogger »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
What is Data Science and How To Start Career As Data Scientist?
Data science is nothing less than a buzzword right now! It is undoubtedly one of the most desired professions for the new generation. Here… Continue reading on
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Automating Source-to-Target Mapping
I built lineage-mcp (Agent-STTM), an MCP server + CLI that reads real SQL scripts and XML ETL exports (SSIS, Informatica PowerCenter, or a… Continue reading on
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
SQL — From Zero to Hero
Everything I Learned Completing The Complete SQL Bootcamp 2026 Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Blog about how I used Cognee’s memory feature into my project
Specially the forget() feature, I personally found it very useful. Continue reading on Medium »
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