You’ve spent the previous 17 chapters learning how to pivot your data to create summary reports. What happens if your source data is already pivoted? It creates pivot tables that are difficult to work with. In this chapter, you will see how the Power Query tools in Excel can be used to unpivot data.
Data in headings creates bad pivot tables
The data in Figure 18-1 is a common format for data. There are three columns of labels on the left and 12 columns of monthly data going across the top.
FIGURE 18-1 ...
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