Mirá, un mate es como un punto y aparte. Uno lo toma y después se puede empezar un nuevo párrafo.
Algebra Relacional
How to emulate relational algebra division operator in SQL
DONE
I found this recently among my files while preparing a lecture on SQL for my Database Systems course. I wrote this on October 2010 and have not checked it since then, but I believe in the correctness of the information.
To my spanish readers, I ask for your forgiveness, I need to write a few things in english from time to time to avoid getting clogged (Is it "clogged" the right word?).