The reason why this misunderstanding is so pervasive is probably because joins are effectively function application (or function composition, bit of the same th

The reason why this misunderstanding is so pervasive is probably because joins are effectively function application (or function composition, bit of the same thing really). I also wrote about this ;-) https://pragmathics.nl/2023/10/24/putting-the-relational-back-in-relational-databases/#functions https://pragmathics.nl/2023/10/24/putting-the-relational-bac...