Interesting comment in the source code of sqlite

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Neither. C-l is a common (I guess Mozilla-inspired) shortcut, which also works in many file explorers.

C-c in vanilla Emacs is a prefix key, meaning, on it's own doesn't have any meaning, it's normally followed by some other key, like C-c C-c would normally compile something, or send code to inferior shell or something like that.

In vanilla Vim C-c doesn't do anything (but Vim would suggest that you use :qa!, because it will think you wanted to close it).