#HOW TO INSTALL POSTGRESQL
brew update
brew install postgresql
postgres --

#HOW TO CREATE A PHYSICAL POSTGRESQL DATABASE
initdb /usr/local/var/

#HOW TO START/STOP A POSTGRESQL DATABASE
pg_ctl -D /usr/local/var/postgres start
pg_ctl -D /usr/local/var/postgres stop

#HOW TO CREATE THE ACTUAL POSTGRESQL DATABASE
createdb mydatabasename
dropdb mydatabasename

psql mydatabasename

CREATE DATABASE mydatabasename;
DROP DATABASE mydatabasename;