Creating Tables Dum and Dee in PostgreSQL

I was nerd-sniped: https://twitter.com/benjiweber/status/842725600280428545 So tables dee and dum are two theoretical tables in SQL, and they can be characterised as such: [Dee] is the relation that has no attributes and a single tuple. It plays the role of True. [Dum] is the relation that has no attributes and no tuples. It plays the role … Continue reading Creating Tables Dum and Dee in PostgreSQL