I learned Pascal with these, which seemed to be all the rage in the 80's, or for Pascal, or the intersection of them. SQLITE uses them now as well: https://www

I learned Pascal with these, which seemed to be all the rage in the 80's, or for Pascal, or the intersection of them. SQLITE uses them now as well: https://www.sqlite.org/lang_aggfunc.html https://www.sqlite.org/lang_aggfunc.html