Postgres

Operation

psql -h <HOSTNAME> -U <USER> [<DB>]
psql <DB> <USER>
  \l // show databases
  \c <DB> // connect to DB
  \d <TABLE> // show schema of table
  \dt // show tables
  <SQL>;
  CREATE DATABASE <DB>; // !!! case sensitive and semicolon
dropdb -h <HOSTNAME> -U <User> <DB>
createdb -h <HOSTNAME> -U <User> <DB>