Import/updating into Zoho CRM skiping blank cells

Hey everyone i have a question.

Is it possible to import/update existing records into zoho crm? but with a catch.

Normally i know i can import -> update current records -> use this column as main etc

But i have an excel file with different data in it (ignore the "-" thats just there to indicate no data)

So i want to update the records in Zoho that have the ID but only the cells that have data in them.

Is this possible? will zoho know to skip a cell if it is empty and only update the field it has data?

Or will it just update that field in zoho with "blank"

AS you can see for the 1st record only the phone should be updated ignoring family name and email

for the 2nd ID only family name ignoring everything else. And so on.

Is this even plausible ?

Thanks again for your time. Have a nice day and easy rest of the week.

Daniel