Are there any well-known German expressions for someone who is very board and detailed in knowledge? for example:
He is a human database
Are there any well-known German expressions for someone who is very board and detailed in knowledge? for example:
He is a human database
There's
Sie ist ein wandelndes Lexikon.
Sometimes also used in this form
Sie ist ein lebendes Lexikon.
One option would be "der/die Universalgelehrte" from the English word "polymath".
There is also the exppression "Hansdampf in allen Gassen."
I think both Alleskönner and Tausendsassa could fit as well, if a more colloquial term is needed. Multitalent would be another option.
The word I would use is "savant." It was originally French, may have been adopted in German, but I'm not sure.