Describes the cause and action for error messages.
Error Message(English)：
cannot filter merged cells
Excel filtering for merged cells - Stack Overflow
https://stackoverflow.com/questions/49816515/excel-filtering-for-merged-cells
Filtering issue with a column when 2 cells are merged together ...
https://stackoverflow.com/questions/36066346/filtering-issue-with-a-column-when-2-cells-are-merged-t・・・
Excel: filter merged cells workarround
https://stackoverflow.com/questions/39416801/excel-filter-merged-cells-workarround
How to sort/filter merged cells in Excel?
https://stackoverflow.com/questions/16789992/how-to-sort-filter-merged-cells-in-excel
Sorting an Excel Table that contains Merged Cells
https://stackoverflow.com/questions/7549570/sorting-an-excel-table-that-contains-merged-cells
Excel: Filter on the merged cells - YouTube
https://www.youtube.com/watch?v=-Udd6Nc74dY
https://www.youtube.com/watch?v=-Udd6Nc74dY
Technique 1 to Filter Merged Data Cells in Excel - YouTube
https://www.youtube.com/watch?v=up3ZzvjXX44
https://www.youtube.com/watch?v=up3ZzvjXX44