Comparing 2 MySQL table with Server Connect

Hi everybody,
I m so sorry these week I din t follow properly the forum but I had to work (sometimes happens)

I got a problem that I think I can solve in wappler but because I’m not so good in Conditions in Server Connect I m here to challenge you (translation: help me pleaseeeeee )

The problem is the following:

1. I have two tables in MySQL with long list of emails.
2. The second table contains a subset of the first email.

Like a full list of mailing list and just the list who opened the email.
I would love to make a repeat in ServerConnect to compare the list and when an email is found in the “opened” table, it is deleted in the big list…

I tried to do it… but at the last I got message from Wappler:
“Roberto, switch off and go outside walking, it is better!!”

Any suggestion?