Power BI developers use Power Query to perform complex transformations such as merging, filtering, and pivoting datasets. They apply advanced M scripting to automate repetitive tasks and achieve dynamic data shaping. Query folding is utilized whenever possible to push transformations back to the data source, reducing processing load in Power BI. Dataflows are implemented for shared, reusable transformations across multiple reports. Power BI developer also use calculated columns and DAX for nuanced data manipulations when required. These techniques ensure clean, structured, and accurate datasets ready for visualization and analysis.
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