The Library · Insights
Deep dives across data, automation & AI
979 in-depth articles — from Excel foundations to production machine learning. Filter by topic or difficulty to find exactly what you need.
Power QueryPractitioner
Working with Dates and Text in Power Query: Advanced Transformation Techniques
Master Power Query's text and date functions through practical examples. Learn to parse multiple date formats, clean messy text data, and optimize performance for production workflows.
14 min read
Microsoft ExcelPractitioner
Essential Excel Functions: Master SUM, AVERAGE, COUNT, IF, and COUNTIF for Data Analysis
Learn Excel's five core functions that handle 80% of data analysis tasks. Build dynamic dashboards, handle data quality issues, and create conditional logic that transforms raw data into actionable insights.
13 min read
Career DevelopmentFoundation
Networking for Data Professionals: LinkedIn, Communities, and Conferences
Master professional networking strategies that data professionals use to uncover hidden job opportunities, build industry relationships, and accelerate career growth through digital platforms and industry events.
17 min read
Data EngineeringExpert
Advanced API Integration for Data Pipelines: Mastering REST, Pagination, and Rate Limiting
Master production-scale API integration patterns including sophisticated pagination strategies, adaptive rate limiting algorithms, and resilience patterns for high-throughput data pipelines.
23 min read
AI & Machine LearningPractitioner
AI-Powered Data Analysis with Code Interpreter and Copilot
Master professional data analysis workflows using AI assistants. Learn advanced prompt engineering, validation strategies, and production-ready implementation patterns for Code Interpreter and GitHub Copilot.
18 min read
Power AutomatePractitioner
Desktop Flows: Automate Legacy Applications with RPA in Power Automate
Master robotic process automation for legacy Windows applications. Learn to build robust Desktop Flows that extract data, handle errors gracefully, and integrate with modern cloud services through practical, production-ready examples.
25 min read
Power AppsPractitioner
Offline-Capable Power Apps: Build Apps That Work Without Internet
Learn to build Power Apps that work reliably offline with smart synchronization, conflict resolution, and seamless online/offline transitions. Complete hands-on tutorial with real-world inspection app.
14 min read
Power BIExpert
Power BI Mobile: Design Reports That Work on Any Device
Master advanced responsive design techniques for Power BI mobile reports. Learn to optimize performance, implement touch-first interactions, and create app-like experiences across phones, tablets, and desktop devices.
22 min read
Power QueryFoundation
Master Custom Columns and Conditional Logic in Power Query
Learn to create powerful conditional logic and custom columns in Power Query that automatically categorize data, apply business rules, and calculate derived values. Transform raw data into actionable insights with practical, real-world examples.
13 min read
Microsoft ExcelExpert
Cell References Explained: Relative, Absolute, and Mixed References in Excel
Master Excel's three reference types to build robust, scalable spreadsheets. Learn when formulas break during copying and how to fix them with precise reference control.
25 min read
Career DevelopmentExpert
SQL Interview Questions: From Basics to Advanced with Solutions
Master SQL interview questions from basic joins to advanced window functions. Learn the systematic approach, common pitfalls, and optimization techniques that separate experts from the rest.
20 min read
Data EngineeringPractitioner
Scheduling and Orchestrating Pipelines with Airflow
Master production-ready data pipeline orchestration with Apache Airflow. Learn to build robust DAGs with advanced scheduling, error handling, monitoring, and dynamic task generation for real-world data engineering challenges.
18 min read