How is Data shown on Form Control different than what is there on Database

Hello Mentors,

I have specific Data eg: "Schnieglinger Straße 162" (Possibly a German Address) in my database, but the same address when seen on Form Control, it shows as "SCHNIEGLINGER STRASSE 162"

As a matter of fact when i assign a hardcoded value of "Schnieglinger Straße 162" to a Form Control say ADD1, it shows as "SCHNIEGLINGER STRASSE 162".

My question is What happens at the DD Item/ Form level which shows the same data differently? I understand ADD1 is UPPER Case Only but i am more keen to know about that Special Character "ß" which got converted to "SS"