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Dev.to
5/10/2026
Master Power Query in Power

Master Power Query in Power

Original: Mastering Power Query in Power BI: A Complete Data Transformation Guide

Short summary

Comprehensive Power Query tutorial covering data transformation essentials—profiling, cleaning, null handling, merging, and formatting. Uses a real 163K-row dataset spanning 2015–2020 with practical step-by-step instructions for Power BI data preparation. Includes Power Query's AI-assisted 'Column from Examples' feature for automatic transformation inference.

  • •Data profiling views (Column Quality, Distribution, Profile) surface data quality issues
  • •Step-by-step techniques for cleaning, deduplication, merging, and unpivoting data
  • •AI-assisted 'Column from Examples' learns transformation rules from 1–3 example outputs

Generated with AI, which can make mistakes.

#ai-tools#certification-education
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