Read-only sqlite DBs from the CLI

Honoring the principle of least privilege, I prefer to open sqlite DBs in read-only mode when peeking at the data through the CLI, to avoid unexpected modifications.

The CLI provides a -readonly flag:

sqlite3 --help |& grep readonly
   -readonly            open the database read-only

Also TIL about |& to pipe both std-out and std-err, tested in fish and bash.