Power BI applies sophisticated algorithms during the import process to determine the sort order that maximizes compression. However, the chosen sort order might not align with the top performance priorities of the model. For example, it may be more important to improve query performance for reports accessing a certain column, such as Store ID or Date (via relationships to dimension tables), rather than minimizing the size of the overall dataset. Ordering the imported data by these priority columns maximizes their compression while potentially reducing the compression applied to other columns.
- Identify the column (or columns) to order by and note the current memory. In this example, the Order Date column is 16.7 ...
