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Explore in-depth tutorials and guides across data analytics, automation, and AI. Filter by topic or difficulty to find exactly what you need.
Power Query⚡ Practitioner
Implementing Custom Query Folding Logic in M: Keeping Transformations Native to the Data Source
Query folding can mean the difference between a 2-minute refresh and a 25-minute timeout on large datasets. This lesson teaches you to diagnose folding breaks, restructure queries to preserve them, and use Value.NativeQuery for precise native SQL control — with production-ready patterns throughout.
21 min read
Power Query⚡ Practitioner
Automating Incremental Data Refreshes in Power Query with Persistent State and Change Tracking
Full refreshes at scale are a performance disaster — but Power Query gives you the tools to build watermark-based incremental pipelines that only process what's actually changed. This lesson walks through the complete architecture: persistent state, upsert merging, late-arrival handling, and failure recovery.
22 min read
Power Query🌱 Foundation
Advanced M: Iterators, Accumulators, and Recursive Patterns
Master Power Query's most powerful patterns for complex data transformations. Learn List.Generate, List.Accumulate, and recursive functions to solve problems that standard operations can't handle.
13 min read
Power Query🔥 Expert
Building a Reusable Function Library in Power Query
Master advanced M language patterns to create maintainable, performance-optimized function libraries that transform how your team works with Power Query across projects.
30 min read
Power Query⚡ Practitioner
M Language Performance Patterns and Anti-Patterns: Optimize Power Query for Speed
Master the performance patterns that make M Language queries blazingly fast and eliminate the anti-patterns that kill query folding. Learn memory management, join optimization, and debugging techniques for production-ready Power Query solutions.
15 min read
Power Query🌱 Foundation
Working with JSON and XML Data Sources in M: Complete Foundation Guide
Master Power Query's M language functions for parsing and transforming JSON and XML data into analysis-ready tables. Learn practical techniques for handling nested structures, missing fields, and common data quality issues.
13 min read
Power Query🔥 Expert
Advanced JSON and XML Processing in Power Query M Language
Master sophisticated techniques for processing semi-structured data in M, including recursive navigation, namespace handling, performance optimization, and building resilient transformation pipelines for production systems.
27 min read
Power Query⚡ Practitioner
Advanced JSON and XML Data Processing in Power Query M Language
Master complex semi-structured data transformations with defensive navigation, performance optimization, and real-world multi-source integration patterns in M.
17 min read
Power Query🌱 Foundation
Dynamic Queries with M: Build Flexible, Reusable Transformations
Learn to create Power Query transformations that adapt based on parameters, building reusable data processing engines that scale across different scenarios and requirements.
14 min read
Power Query🔥 Expert
Error Handling and Try-Otherwise Patterns in M: Building Production-Ready Power Query Solutions
Master advanced error handling in M language with comprehensive strategies for building robust, production-grade Power Query solutions that gracefully handle failures and adapt to changing data conditions.
29 min read
Power Query⚡ Practitioner
Advanced Table Operations: Group, Join, and Transform in M Language
Master sophisticated table manipulation in Power Query M including custom aggregations, complex joins, and dynamic transformations for professional data analysis workflows.
15 min read
Power Query🌱 Foundation
List and Record Operations in M: Transform, Select, and Combine Data Structures
Master the fundamental list and record operations in Power Query's M language. Learn to transform nested data, select specific elements, and combine complex data structures with practical, real-world examples.
14 min read