Loading an Excel file, I have a column that, depending on the contents (or rather lack of), needs to be removed.
I can go the strange way of transposing the table (since in my case it's always the first column that's under the question) and deleting what is now the row. But I would like to know, in general, if I need to delete a column based on value(s) in it, how would I go about doing that?
You can use DROP FIELD to actually remove a column completely after you've loaded it. Wrap it in an IF block to conditionally drop the field.
If you just mean removing the value based on a condition:
if(condition, value) as value
Only in the given condition will value be filled in. Otherwise the value in the column will be null.