form with repeater, google sheet and more

EDIT: Done with CF8, saves correctly to DB, creates a sheet (using php cURL to be able to split one field array into sheet rows) 

I would like to create a form with repeater.

The data should write to the DB and also to google sheet, while splitting arrays to rows in the sheet.

I also need to save each row of the repeater into new row in the database where each field goes to it's designated column.

Is it possible to create a custom SQL ?

if I put a fully custom INSERT, do I need to sanitize it?