What is required for merging values in specified columns from component worksheets?

The requirement that columns must contain data of the same type is crucial for merging values from component worksheets. This ensures that the data can be combined correctly without causing errors or inconsistencies. For example, if one column contains numeric values and another column has text data, the merging process would be problematic, as the system may not know how to handle differing data types properly. Merging values assumes that the data can be processed uniformly, thus maintaining coherence in the resulting dataset.

While sorting columns or ensuring uniqueness across worksheets may have their own importance in specific contexts, they do not directly address the fundamental requirement of having consistent data types for successful merging. Validation of columns before merging can also be useful, but it is not a prerequisite strictly tied to the merging of values from those columns. Therefore, the correct focus lies in ensuring that all columns involved in the merge contain compatible data types.