"Let's think about queries as a function." How about we don't, and think about queries as the algebraic relations that they are? I always found this explanati

"Let's think about queries as a function." How about we don't, and think about queries as the algebraic relations that they are? I always found this explanation of SQL (and SQL-like) recursion much more reasonable than efforts to shoehorn SQL into an iterative, functional box: https://core.ac.uk/download/pdf/11454271.pdf https://core.ac.uk/download/pdf/11454271.pdf