[2021-06-20 17:39 +0100] Wolter HV:
You can find the script attached. To experiment with this, simply run
.read feature_showcase.sqlwithin an interactive sqlite3 session. (There may be other ways of doing it but this is how I tested it.)
I found out, unsurprisingly, that my attachment didn't make it into the mailing list :D
Here is a pastebin link with the aforementioned sqlite3 SQL script:
https://paste.gnome.org/pca7e7y0v
Regards, Wolter HV