From memory the sqlite3 API is something like

    sqlite3 data.db 'select text from notes'

I use sqlite3 to load and query random CSVs all the time. It feels a bit weird to hear data described as "locked" within a SQLite DB, because it's one of the simplest non-text formats for me to read data from. It would surprise me of it took more than five minutes to set up a one-way cron job to dump your notes into plain text files.