The Library · Insights
Deep dives across data, automation & AI
978 in-depth articles — from Excel foundations to production machine learning. Filter by topic or difficulty to find exactly what you need.
Career DevelopmentFoundation
Acing the Data Analyst Technical Interview
20 min read
Power BIExpert
Row-Level Security in Power BI
28 min read
Power BIFoundation
Your First Power BI Report in 30 Minutes
18 min read
Career DevelopmentFoundation
Building a Data Portfolio That Gets Interviews
26 min read
Career DevelopmentPractitioner
How to Price Your Data Freelancing Services
18 min read
SQLFoundation
SQL JOINs Explained with Real-World Examples
14 min read
Power AppsFoundation
Build Your First Canvas App in Power Apps
19 min read
Data EngineeringPractitioner
Data Pipeline Orchestration with Airflow
28 min read
Data EngineeringFoundation
ETL vs ELT: Choosing the Right Approach
17 min read
AI & Machine LearningFoundation
Prompt Engineering Fundamentals for Data Professionals
Learn the systematic approach to crafting AI prompts that generate reliable, actionable data insights. Master the four-pillar framework that transforms vague questions into precise analytical conversations.
18 min read
SQLPractitioner
Window Functions: RANK, ROW_NUMBER, and LAG
18 min read
Microsoft ExcelFoundation
VLOOKUP vs XLOOKUP: The Definitive Comparison
14 min read