How to identify archive file format (PC only detects it as "file")

[otchi]

Odd, I pasted that and pressed enter, and it went back to the blank screen with the "sqlite>" in the corner
Maybe something's wrong with the file itself. I tried with a different file and it works just fine.
I can't imagine what could possibly have gone wrong, though. It's the exact same file I posted here, and it works for you... but not for me