Iґm not really sure, what is optimal. But I think: empty table is optimal.
But I donґt know how this can displayed if website
www.gym-anna-ehemalige.de/index.php/personenuebersicht is starting.
Concerning your question "Do you want to enter default search string for "Suche" field?" I answer:
I need no default search string - except "empty string". But "empty string" shows all.
A string like "zzzz" shows no entry. But the user has to clear "zzzz" - and that isnґt optimal.
Do you understand my intent?
Regards
Jochen