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
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
12h ago
From Unstructured Logs to Clean JSON: A Free-Model ETL Case Study
Three months ago I inherited a log file from an old Node.js application. It was 500 lines of mixed formats: some lines had bracketed timestamps, some had ISO 86

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
15h ago
Before Body Cameras Arrive, Police Needs to Decide What It Will Keep
NZ Police is looking for a national system to manage the digital evidence it already collects and the body-camera footage it may collect… Continue reading on Me
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1d ago
The Hidden Cost of Switching Between Database Tools
Context switching is slowing modern data teams more than they realize. Data teams have more tools than ever: one tab for SQL, another for docs, a BI dashboard f
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1d ago
How AI Can Help Students Analyze Data Faster Without Replacing Statistical Thinking
How AI Can Help Students Analyze Data Faster Without Replacing Statistical Thinking AI is changing how students and researchers approach data analysis. Today, a
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2d ago
DeepSeek Harness Updated : What’s New !!
DeepSeek Harness Tutorial Continue reading on Data Science in Your Pocket »

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
Getting into Data Engineering is actually pretty easy
Background · 5 core skills · business context Continue reading on Medium »

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
What is liquid cooling in a data center?
Ever observed your laptop getting warm when you use it for a long duration? Continue reading on Medium »
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
You have to process 5 gb of csv file but your system has 2gb of RAM .
This is a classic external-memory / streaming processing problem. The key is: never load the 5 GB CSV into RAM. Continue reading on Medium »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
Turning Escalation Data into Strategic Decisions with Gemini in BigQuery
Gen AI Academy APAC — Track 2 (Turn Business Data into Strategic Decisions) Why this one, and why it builds on Track 1 For Track 1, I built an agent that classi

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Power BI for Beginners: Complete Learning Roadmap to Become a Data Analyst
Every business you can think of is sitting on a pile of data it doesn’t fully understand. Sales numbers scattered across Excel sheets… Continue reading on Mediu

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How People Counting Software Helps Businesses Understand Customer Traffic
Learn more about how people counting software assists in measuring footfall, analysing customer movement, improving operations, and making… Continue reading on

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Why Netflix Rarely Feels Random: The Data Journey Behind a Personalised Recommendation
You open Netflix after a long day. The homepage loads, and within a few seconds, something catches your attention. Maybe it is a crime… Continue reading on Medi
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
What is data science?
Data science combines math and statistics, specialized programming, advanced analytics, ai and machine learning with specific subject… Continue reading on Data
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
That Job Form Asked About Your Mom's Health. In Illinois, That's a $15,000 Question.
How Illinois GIPA lawsuits are reshaping engineering data pipelines If you build internal tools, onboarding portals, or HR tech workflows, Illinois just deliver
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
qKnow Professional Edition v3.1.2 Released: Seamless HDFS/OSS Integration for Instant Massive Data Ingestion
The qKnow Agent Building Platform Professional Edition v3.1.2 is now live, featuring significant optimizations to knowledge file data synchronization. This rele

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
6d ago
I Reviewed the Most Common Account Reconciliation KPIs. Most Finance Teams Measure the Wrong Ones
Finance dashboards can make reconciliation look healthier than it actually is. Completion reaches 100%, automatic match rates climb, cycle… Continue reading on

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
6d ago
Someone Just Built a Database of Bribes Demanded Across India
A developer shipped what years of anti-corruption policy couldn’t: a searchable, anonymous, pattern-detecting record of everyday… Continue reading on Medium »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
The Decline of Metadata Tools: Why You Need a Semantic Compiler
The metadata catalog category consolidated in 2025 and almost nobody wrote the post-mortem. It wasn't a product failure. The ROI case never closed. The original

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Metadata: The Silent Architect
Figure 1 — Image edited with Grok Imagine, showing metadata as medicine. Continue reading on Medium »

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
How Data Science Secures Biometrics in 2026
Passwords are fast becoming a thing of the past. Today, your face, fingerprint, voice, and even the way you type serve as your primary… Continue reading on Medi
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Why MBA Students Should Learn Data Science and Business Intelligence in 2026
<img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazon

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Azure Data Factory — Job Seeker Tips | Top 25 Questions from real scenarios to interview-winning…
⚙️ ADF & IR pipelines & triggers interview craft Continue reading on Medium »

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
The Journey of a SQL Query
From Declaration to Parsing, Optimization, Planning & Execution Continue reading on Medium »

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Why Your “Advanced” Power BI Dashboard Is Actually Hurting Your Career
Your Power BI dashboard has 27 visuals, 14 slicers, 38 measures, and a dark-mode theme. So why does nobody use it? Continue reading on Medium »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Extracting Structured Data From a Zoning Compliance Letter
A zoning compliance letter is a short prose letter carrying a legal conclusion about one parcel on one date. Extract it as “address, zone, compliant yes/no” and
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
How to Shine as a Data Scientist in the Vibe Coding Era
Here's how to be the Data Scientist who thrives in a world where coding is a commodity. The post How to Shine as a Data Scientist in the Vibe Coding Era appeare
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
How to Clean Large CSV Files in Seconds Without Blowing Up Your RAM
Why loading gigabytes of data into Pandas just to fix headers or sanitize null values is overkill — and how a lightweight streaming… Continue reading on Medium
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
How to Build Job-Ready Skills for a Career in Data Analytics?
<img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazon

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Building a Polished Table with Python’s great_tables
If you’ve ever tried to quickly make a table in Python look presentable, you know how difficult it can be. great_tables is a great helper… Continue reading on M

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
The Complete Guide to SQL Window Functions
If you’ve ever written a subquery just to calculate a running total, or self-joined a table to compare each row to the one before it… Continue reading on Medium
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Extracting Structured Fields From a Purchase Requisition Form
A purchase order commits the company to a vendor. A requisition commits nobody to anything — it is an internal request for permission to spend. Extracting one a
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
The Duplicate You Tolerate Is a Decision You’ve Made
A few months ago, I sat in on a data quality review at a retail company I was working with. Someone pulled up the customer master and… Continue reading on Mediu

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Big Data SaaS Market: Global Competitive Landscape, Key Players, and Growth Drivers
The global Big Data Software as a Service (SaaS) market is undergoing a major transformation driven by enterprise demand for real-time… Continue reading on Medi
Reddit r/learnprogramming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Not enjoying coding/web development — should I switch to Data Analytics?
I’m a 2nd-year CSE student currently learning frontend/web development, but honestly I’m not enjoying it much and I keep avoiding it. The confusing part is that
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Spark Architecture: Understanding Driver, Executors, Jobs, Stages, and Tasks
Apache Spark looks simple from the outside: write a few DataFrame operations and run your pipeline. Under the hood, however, Spark builds… Continue reading on M

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
10 Data Visualization Techniques Data Analyst Should Master Based on Core Visualization Principles
Core visualization techniques for communicating patterns, comparisons, trends, and insights clearly to stakeholders Continue reading on Medium »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
Energy Consumption Assessment and Optimization Paths for Data Center-Scale KV Cache Deployment
The deployment location and access path of KV Cache are becoming a non-negligible variable in data center energy bills. Based on measured data from Mingxin FX10
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
Redacting PII 100% Offline: A Technical Deep Dive
Cross-posted from Medium. Originally published at https://medium.com/data-science-collective/redacting-pii-100-offline-a-technical-deep-dive-a326f9fed3b8 If you

Medium · AI
📊 Data Analytics & Business Intelligence
2w ago
Branded or Just Lucky? Microsoft Clarity’s New Dashboard Finally Tells You Which
Microsoft’s free analytics tool just drew a line between the traffic that already loves you and the traffic that’s still shopping around. Continue reading on Me
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
Building Modern Data Architectures for AI-Ready Enterprises
<img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazon
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
35% Increase in Logistics Sales Conversion with Big Data
Bottlenecks of Traditional Processes in Logistics Sales Logistics sales and marketing processes are becoming increasingly complex due to global supply chain flu

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
9 SQL Habits That Separate People Who Trust Their Data From People Who Get Surprised By It
SQL has a strange reputation. Everyone learns just enough of it to get by, a SELECT, a JOIN, a WHERE clause, and then stops, treating it… Continue reading on Me
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
I Thought Loading Data Was the Finish Line. It Was the Starting Point.
Building my first dbt models and learning what “analysis-ready” data actually means The post I Thought Loading Data Was the Finish Line. It Was the Starting Poi

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
Exploratory Data Analysis: Know Your Data Before You Trust It
Exploratory Data Analysis helps uncover hidden patterns, trends, relationships, anomalies, and meaningful insights in data. Continue reading on AIMS-DTU »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
Automated Web Scraping and Data Visualization with Python and AI — Part 1: Introduction to Web Scraping and Data Visualization
Automated Web Scraping and Data Visualization with Python and AI — Part 1: Introduction to Web Scraping and Data Visualization In our previous parts, we briefly
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
The "X Megawatts Powers Y Homes" Trick — and Why "Surplus Power" Has the Same Problem
There's a conflation baked into almost every headline energy claim, and once you see it you can't unsee it. "100 MW powers 85,000 homes" sounds like a statement
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
I Stopped Learning Unity Catalog as a Databricks Feature. Everything Finally Made Sense.
A first-principles walk from raw bytes to enterprise governance — and why the architecture, not the feature list, is what actually matters. Continue reading on
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2w ago
Your Data Infrastructure Was Built for a World That No Longer Exists
In 2010, moving data workloads to the cloud felt radical. By 2018, it was table stakes. Continue reading on Medium »
DeepCamp AI