I want to investigate the rows for which a certain column is empty. I'll fill these cells based on values in other columns, but I want to identify which ones have not yet been done.
If I make a filter on that column, it doesn't do anything until I type something - but the thing I'm looking for is nothing...
I tried a few regexs, like ^$
, ^\s*$
and ^.{0}$
, but no rows are select for any of these filters.