Relative adverb " where"

Dear, teachers.

I've learned a clause that follows a relative adverb takes a complete sentence

like this. "that's where my queen lives"

and, I thought the relative adverb "where' is omitted in the following sentence.

"It's the only place (where) I know her from"

but I don't know why this sentence has "from".

if the above sentence is right. Should "that's where my queen lives" be "that's where

my qeeun lives in"?

or if a relative pronoun was omitted in the sentence,

for example "It's the only place (that) I know her from"

then, Are there any difference in meaning between "It's the only place I know her" and "It's

the only place I know her from"?

thanks in advance.