I have 3 columns and here are 2 possible ways:
1. In all of them are values
2. Only col1 keeps value (col2 and col3 NULL)
For now It looks like:
| col1 | col2 | col3 |
----------------------
| val1 | | |
| val2 | val3 | val4 |
| val5 | val6 | val7 |
| val8 | | |
It should be like this:
| col1 | col2 | col3 |
----------------------
| val1 | -- merged cells, because col2 and col3 empty
| val2 | val3 | val4 |
| val5 | val6 | val7 |
| val8 | -- merged cells, because col2 and col3 empty
I don't have idea If I need to create groups (I've tried row/column grouping, but really unsuccessfully, far away from what I need).
As I think I need to write expression something like:
IFF(col2 & col3 = NULL) MERGE(col1, col2, col3)
Just I can't get success with expression's structure.