I am trying to use an expression on the values that are imported from another spreadsheet. The IMPORTRANGE copies the raw data, and with QUERY I can then specify which columns to use, so I can skip some of them.
However, I want to process the imported values by some expression. The QUERY doesn't seem to support different string functions like LEN, etc. But if I use an expression over the QUERY, like "=LEN(QUERY(...", then I get only one record as a result, not a list of rows, as I would from IMPORTRANGE and QUERY.
Specifically, I have a source spreadsheet, that is filled automatically by one of my Google Forms, and there is a column with a list of personal names. This source spreadsheet is restricted to only a few users. But I have create another spreadsheet, for the public use. In this copy, I want to display all the non-sensitive columns, but for the personal names column, I want to display only a number of the names, which are comma-separated. The expression to get the number of the names is otherwise trivial:
=IF(LEN(TRIM(A1)) > 0; COUNTA(SPLIT(A1; ",")); "")
I could use the expression in the source spreadsheet, but it's overwritten by Google Forms. So I need to use the expression in the copied spreadsheet.
What are the possible solutions? I haven't found any questions similar to mine.