Single 'update request' email even when several rows are affected (date trigger)

I want to send out a single notification even when several rows are affected. I read it elsewhere in the forum that the Daily" option should "roll up" multiple instances of that workflow triggering into a single email - however the user receives one email per row.

Currently I'm running the workflow each day:

However the user received an email for each update

2nd question: what would be the way to send out the email only once?

Thank you very much,