SQL

psql connect

psql -d gpdatabase -h master_host -p 5432 -U gpadmin

psql connect to database

psql -d postgres -h [host] -p [port] -U [user]

postgresql connect to database

psql -d geo -h 192.168.1.12 -p 5432 -U supervisor

// geo is a database and supervisor is a user
// Once on postgres you can change the database by typing

c postgres

how to connect to postgres

psql dbname postgres

connect to postgresql

bash-4.2$ psql -h <hostname or ip address> -p <port number of remote machine> -d <database name which you want to connect> -U <username of the database server>

Postgresql connect

import sqlalchemy

engine = sqlalchemy.create_engine('postgresql://username:password@localhost/mydatabase')