Incremental load in Power Query querypower.com

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Incremental load in Power Query querypower.com

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Last edited Mar 24, 2017

Created on Mar 24, 2017

This example shows how incremental data loading works in Power Query by connecting to a local Excel spreadsheet, reading the “Transactions” table, and casting its “Time” column to datetime and “Value” to a 64-bit integer. The Power Query M code uses `Excel.Workbook` and `File.Contents` to access the file, then `Table.TransformColumnTypes` to enforce data types. It demonstrates a straightforward refresh pattern where only the source file’s contents are pulled in on each load, rather than transforming data in memory. The visualization highlights the step-by-step M formula structure, making the query logic explicit and reproducible.

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