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 · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5h ago
The Difference Between WHERE and HAVING Is Not What You Think. Here’s the Query Plan Proof.
If you’ve ever been asked the difference between WHERE and HAVING in an interview, you probably gave the textbook answer: "WHERE filters… Continue reading on Me
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
16h ago
What are the real-world applications of data science?
Businesses across every industry generate huge amounts of data every day. From online shopping and digital payments to healthcare records and social media activ

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
17h ago
Foundation First : Why Poor Data Quality Silently Destroys Enterprise AI, Analytics, and System…
The Hidden Risk Behind Every AI Investment Continue reading on Medium »

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1d ago
The Data Engineering Tool You “Must Learn” Changes Every Week. That Should Tell You Something.
I’ve worked across the data field long enough to see the pattern — and it has nothing to do with which tool is actually best. Continue reading on Medium »
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1d ago
Surviving the Data Science Behavioral Interview
In the age of AI, standing out here means a lot more than ever. Here are three tips to walk into your next interview with confidence. The post Surviving the Dat

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2d ago
The Complete SQL Roadmap for 2026: From First Query to Job-Ready
SQL turned 50 this year. It is still the single most requested skill on every data analyst job posting — and the roadmap to mastering it… Continue reading on Me
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2d ago
I Completed Five Years in Analytics Consulting: 5 Lessons That Changed How I Work
The tools I use for analytics and reporting have changed more than I expected, yet my questions for any analytics project haven't moved much. The post I Complet

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2d ago
Easily Remove Duplicate Records Using Power Query(.pbix included)
When working with large datasets, duplicate records can quickly become a headache. They inflate file sizes, distort analysis, and lead to… Continue reading on M
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
2d ago
Skill AI untuk Analisis Data yang Mulai Banyak Dicari Perusahaan
Pemanfaatan Artificial Intelligence (AI) dalam dunia kerja terus meningkat, termasuk untuk kebutuhan analisis data. Continue reading on Medium »

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
Only 14% of tech job postings actually tell you the salary. I measured it.
I run a thing that snapshots every open role on a few thousand companies’ own Greenhouse, Lever, and Ashby boards once a day — about… Continue reading on Medium
Reddit r/learnprogramming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
question about DS the stack
can you explain how the stack is connected to the backtracking algorithms(maze, file directories) and calling functions(call stack) everything inside () was giv
Reddit r/learnprogramming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
3d ago
How can I build an automated system to gather date from a BMS app?
Hi, part of my job is to plot specific data from charging and discharging a battery via its BMS (battery management system) app periodically. It would make my l
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
4d 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

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 · 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 · 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 »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d 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 · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d 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 · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
FIRST_VALUE and LAST_VALUE in SQL — One Works Like Magic, the Other Lies to Your Face
Let me tell you something that took me an embarrassingly long time to figure out. Continue reading on Medium »
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 · 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 · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
5d ago
SQL Text Sorting With Collations
Text sorting can feel small until two databases give different answers for the same text. Reports can place uppercase names ahead of… Continue reading on Medium

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
6d 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 AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
6d ago
Julius AI vs ChatGPT for Data Analysis: I Tested Both for a Month (2026)
Julius AI vs ChatGPT for Data Analysis: I Tested Both for a Month (2026) I've been burnt by "revolutionary" data tools before. So when I decided to pit Julius A
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
6d ago
Beyond the Straight Line: Choosing Between OLS, Interaction Terms, and Tweedie Regression
Whether you should stick to a classic Ordinary Least Squares regression, introduce interaction terms, or pivot to a Tweedie distribution depends entirely on how
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
6d ago
The Complete Data Science Roadmap for 2026 (From Zero to Job-Ready)
Everything you need to learn, in the right order, with no fluff — your step-by-step guide to becoming a data scientist this year. Continue reading on Medium »

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
The Allocation Problem No Spreadsheet Solves on Its Own
How data science turns resource allocation from an argument about opinions into a decision you can actually defend. Continue reading on Medium »
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
How to Build a Credit Scoring Grid From a Logistic Regression Model
Turning model coefficients into a 0–1000 score, with risk classes and stability checks The post How to Build a Credit Scoring Grid From a Logistic Regression Mo
Reddit r/learnprogramming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
I'm a student building an ATS. Is this a worthwhile project? What features would make it impressive?
I'm going into 2nd year CS (Data Science) and was thinking of building my own ATS/resume analyzer. The basic idea is to upload a resume, compare it with job des
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
The Privacy Bill Always Comes Due — Joseph Sides
Many companies still treat privacy and data protection like optional overhead. They will spend aggressively on marketing, customer… Continue reading on Medium »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Data Modelling, Joins, Relationships and Schemas in Power Bi.
Often not, most beginners assume that having clean data, visually appealing charts, and well-thought-out dashboards is the most important part of data analysis,
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Everyone Is Learning AI. The Smartest People Are Learning Something Else
The one skill that quietly separates the people who grow from the people who get stuck — and why most people skip it entirely. Continue reading on Data Science

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
I Built a Web App to See Which Bird Party Controls Your County
A few weeks ago, I found myself determining whether different regions of the Netherlands were controlled by the Gull Party, the Corvid… Continue reading on Medi

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
How to Prepare for a Data Analyst Interview
The practical roadmap I would follow to walk into interviews with confidence Continue reading on Medium »

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Python for Data Science: Everything You Need Before NumPy and Pandas
Python is the language that powers modern Data Science. Continue reading on Medium »
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
I Spent an Hour on a Data Preprocessing Task Before Asking Gemini
How Gemini solved my Pandas problem in seconds, and why data science fundamentals still matter to spot suboptimal solutions The post I Spent an Hour on a Data P
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
The Role of AI-Powered Analytics in Improving Operational Efficiency
Organizations today generate vast amounts of operational data from business applications, customer interactions, supply chains, and internal processes. While da

Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Why Data Quality Matters More Than Artificial Intelligence Models
Artificial Intelligence has transformed the way organizations analyze information, automate processes, and make strategic decisions. While… Continue reading on
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Encoding Categorical Data for Outlier Detection
Why one-hot encoding isn’t always the best approach, and alternative encodings The post Encoding Categorical Data for Outlier Detection appeared first on Toward

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
What Nobody Tells Beginners About Learning Web Scraping
It’s not about the code. It’s about the quiet war with your own frustration. Continue reading on Medium »

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Python for Data Science — Scatter Plots and Relationships Between Variables
In the previous article, we learned about three fundamental chart types: Continue reading on Medium »
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Why Your Data Pipeline Works Perfectly… Until Real Users Arrive
The day your clean architecture met reality Continue reading on Medium »
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
The Data Engineer’s Job Is Changing Faster Than Anyone Admits — Here’s What’s Actually Coming in…
The manual work isn’t just getting easier. It’s getting automated away. Here’s the honest map of what survives — and what doesn’t. Continue reading on Medium »
Medium · AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Pandas vs Polars vs DuckDB 2026: I Processed 1 Million Rows in FastAPI (Pandas Crashed My RAM…
I killed a production server with a CSV file. Continue reading on Medium »
Towards Data Science
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
7 Crucial Barriers Between Data Teams and Self-Healing Data Architecture
What data teams need to build with AI to make self-healing data architecture a practical reality The post 7 Crucial Barriers Between Data Teams and Self-Healing

Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
From SQL Beginner to Intermediate: My SQL Learning Journey (Part 2)
When I decided to transition towards Data Engineering, I knew SQL would be the foundation of everything. Continue reading on Medium »
Medium · Programming
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
AI Is Changing ETL Pipelines. But Not in the Way Most People Think!
What every Data Engineer needs to understand before AI becomes a standard part of every Data platform! Continue reading on Medium »
Dev.to AI
📊 Data Analytics & Business Intelligence
⚡ AI Lesson
1w ago
Data Analytics vs Data Science vs Business Intelligence
Data Analytics vs Data Science vs Business Intelligence: Understanding the Differences and Choosing the Right Career Path Data is everywhere. Every online purch
DeepCamp AI