Power Query: Remove These Hidden Errors

Key insights

• Power Query: Microsoft’s tool for shaping data in Excel and Power BI.
  It runs step-based transforms so you clean data before analysis.
• Remove Columns vs Remove Other Columns:
  Remove Columns deletes selected fields;
  Remove Other Columns keeps chosen fields and removes everything else, which is faster on wide tables.
• Common remove actions to use:
  Remove Blank Rows clears empty lines, Remove Top/Bottom Rows drops headers or footers, Remove Duplicates keeps unique records, and Remove Errors removes rows with invalid values.
• Workflow:
  Filter out blanks first, remove unneeded columns early, then handle duplicates and errors later so steps stay stable and predictable.
• M code tip:
  Power Query auto-generates M code; you can fix problems by removing unnecessary generated steps instead of writing new code.
• Best practices:
  Use Remove Other Columns when you know the fields to keep, select multiple columns with Ctrl/Shift to speed work, and pick key columns before using Remove Duplicates.

Keywords

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