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 · Patrick Ryan
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
Why *= 2 is slower than = col * 2 in Pandas — and what strace shows about abstraction cost
This problem looks trivial, but I got curious about what different Pandas update strategies actually...
Dev.to · Paradane
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
CSV File Difference Detection Techniques for Large Datasets - Paradane
Explore practical methods for comparing large CSV files with dynamic row structures. Learn Python-based approaches and schema alignment strategies to handle mul
Dev.to · Abhishek Singh
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
I built a dataset of 50,000 debugging sessions — and what I found surprised me
Most bug datasets only tell you: "Bug was fixed in 23 minutes." They don't tell you what happened...
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
Finding Breakout Stocks Across Daily, Weekly & Monthly — And Ranking the Best (Part 4)
How my trading portal spots stocks breaking out (and breaking down) on three timeframes, and how it sorts the strongest from the noise. Continue reading on Medi
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
Data Cleaning and Translation Hell: The 2,000-Recipe Disaster: Why Data Cleaning is the Ultimate AI…
I thought AI coding would make building my app a breeze. Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
5 Python libraries every data analyst should know
Not the ones every beginner’s list mentions. The ones that actually show up in real analysis work — with the one-liner that makes each… Continue reading on Medi
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
5 Python libraries every data analyst should know
Not the ones every beginner’s list mentions. The ones that actually show up in real analysis work — with the one-liner that makes each… Continue reading on Medi
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
−10°C Means Nothing to Your Dog
How we turned a weather forecast into a dog-walk forecast. Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
The Instrument, the Wu-Hausman Test, and the Wardrobe
How to build the perfect instrument, run the perfect test, and end up exactly where you started Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
Kafka Connect: Setting up and what the Docs skip
The Three Kafka Topics Running Your Connect Cluster and Why You Should Create Them Yourself Continue reading on Towards Data Engineering »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
Data Migration Checklist for Insurance IT Leaders
From decades-old policy administration systems and fragmented claims databases to disconnected underwriting platforms, insurers today are dealing with massive v
Dev.to · Kanishga Subramani
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Day 44 – Exploring ClickHouse® System Tables for Troubleshooting
Introduction ClickHouse® provides a rich collection of built-in system tables that expose...
Dev.to · Kanishga Subramani
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Day 43 – ClickHouse® Join Types and Performance Implications
ClickHouse® Join Types and Performance Implications Introduction JOIN...
Dev.to · hermess Agentt
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
NodeQuest Level 2: Data Router — can you filter faster than me? (free browser game)
Today's challenge: Level 2 — Data Router 🎯 Sort incoming data to the right department using filters...
Dev.to · Nata Rizki
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
YAN — Yet Another Notation: A Data Format Designed for Humans
YAN — Yet Another Notation A human-readable, human-writable, and machine-readable data interchange...
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
10 Data Ingestion Optimization Techniques for Faster and Scalable Processing
High-performance ingestion strategies that reduce latency and scale data processing efficiently Continue reading on Medium »
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
10 Data Ingestion Optimization Techniques for Faster and Scalable Processing
High-performance ingestion strategies that reduce latency and scale data processing efficiently Continue reading on Medium »
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
10 Data Ingestion Optimization Techniques for Faster and Scalable Processing
High-performance ingestion strategies that reduce latency and scale data processing efficiently Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Data Science training in Electronic City Bangalore — Python, ML, Deep Learning, Tableau.
Details & Registration: https://www.emexotechnologies.com/courses/data-science-certification-training-course/ Continue reading on Medium »
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How Bloom Filters Protect Databases from Millions of Invalid Requests
One Data Structure That Can Cut Database Traffic by 90% Continue reading on Medium »
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Data Science
Data Science has become one of the most influential and rapidly growing fields in the digital era. Organizations across industries rely on… Continue reading on
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How to build custom functions on Google Sheets
In this article, we are going to explore how to build your custom functions on Google Sheets, much like Excel VBA, but easier. Continue reading on Medium »
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
How to build custom functions on Google Sheets
In this article, we are going to explore how to build your custom functions on Google Sheets, much like Excel VBA, but easier. Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
The $2.5B Black Box: Programmatic Auditing of the MLC Unmatched Pool
In the music industry, streaming payouts represent a labyrinth of copyrights. When a user hits play on Spotify, Apple Music, or Tidal, the… Continue reading on
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
A Roundabout Puzzle: Can 12 Roads Be Made Safer?
Roundabouts are useful for avoiding the delay of traffic lights, but they also come with a higher risk of accidents. To measure this risk… Continue reading on M
Dev.to · Jorge Martinez
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Algorithmic Entity Resolution in Music Metadata
In the global streaming economy, Spotify, Apple Music, and other DSPs process billions of plays...
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
The 7 Most Impactful Use Cases for Real Estate Data Scraping in 2026
7 real estate scraping workflows for 2026: price monitoring, rental dedup, valuation comps, change detection with schemas and pipeline… Continue reading on Towa
Medium · Deep Learning
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Pandas Explained: The Library That Made Data Analysis Easy
Python and NumPy are excellent for numerical computation. Continue reading on Medium »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Retail losses in India’s derivatives market: A re-examination of the evidence –
Originally published on Progressino By the Strategy Desk at Progressino Editor's note: This article explores Retail losses in India’s derivatives market: A re-e
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
A Bayesian World Cup 2026 Predictor
Predicting goals, not winners — and keeping an honest scoreboard of how often it’s right. Continue reading on Medium »
Dev.to · GrahamduesCN
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
MCP in 2026: The numbers behind the ecosystem explosion
I spent an afternoon digging through the MCP ecosystem numbers. Here is what I found. The...
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
The Best Enterprise Data Recovery Companies in 2026: A Guide for Businesses
Enterprise data loss is very different from losing files on a personal computer. A failed laptop SSD is one thing, but a failed RAID array… Continue reading on
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d ago
Data Science Journey
After almost a decade working across academia and industry in data science, I’ve learned a few lessons worth sharing. Continue reading on Medium »
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Data cleaning is notoriously known as the most time-consuming phase of any data science workflow…
To solve this problem, I built and published PuraLang Engine—an open-source, AI-driven Domain-Specific Language (DSL) framework that… Continue reading on Medium
Dev.to · Allen Yang
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Manage Excel Worksheets in Python: Create, Copy, Delete, and Rename
Worksheets are the fundamental units for organizing and separating data in Excel files. A single...
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
# The Market’s Enigma: How to Read Order Flow Before the Move Happens
In the winter of 1941, the codebreakers at Bletchley Park were not trying to read German messages directly. They were looking for patterns… Continue reading on
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Titanium Dioxide Prices Index Analysis with Quarterly Trend and Forecast Prices Chart
<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 · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Data Science Course: Build Future-Ready Skills for a Successful Career
Data Science Course: Build Future-Ready Skills for a Successful Career Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Month‑End Offer: Data Science & Analytics Courses — Janakpuri
Boost your career with Delhi’s…
Special month‑end discount available — enroll before the offer ends! Institute of Data Science and Analytics, Janakpuri — trusted… Continue reading on Mediu
Dev.to · Kanishga Subramani
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
ClickHouse 26.6 latest update
ClickHouse 26.6 Deep Dive: Streaming Queries, MPP Execution, Geospatial Analytics, and...
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
How top 7 ccTLD zones are covered by AllZonefiles.io in June 2026
Jun 26, 2026 · 1 min read Continue reading on Medium »
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
I’m a Data Analyst. Here’s the Plan I Made When I Realized My Job Was Changing.
The 5 things worth building that automation can’t replace — and how you can start this week. Continue reading on Data Science Collective »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
I’m a Data Analyst. Here’s the Plan I Made When I Realized My Job Was Changing.
The 5 things worth building that automation can’t replace — and how you can start this week. Continue reading on Data Science Collective »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
When Your Chart Lies to You: The Truth Behind Histograms and KDE
What every beginner data analyst needs to understand before trusting any distribution plot. Continue reading on Medium »
Medium · Python
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
When Your Chart Lies to You: The Truth Behind Histograms and KDE
What every beginner data analyst needs to understand before trusting any distribution plot. Continue reading on Medium »
Medium · Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
Why CDP Fails Without Executive Alignment? ( Audio version included)
In today’s data-driven business landscape, many companies invest in a CDP (Customer Data Platform) expecting better customer insights… Continue reading on Mediu
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
️♂️Data Gathering by Any Means
“Data is the new oil,” the quote says. But in reality, it may be far more valuable than oil, because oil is still measured in fiat… Continue reading on Medium »
Dev.to · Parsify.tools
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
How to Stream & Flatten 1GB+ JSON to CSV in the Browser Without Memory Leaks
As developers, data engineers, or analysts, we’ve all been there: you download a massive database...
DeepCamp AI