# psql
# PostgreSQL command-line client.

# Connect to database. It connects to localhost using default port 5432 with default user as currently logged in user:
psql database

# Connect to database on given server host running on given port with given username, without a password prompt:
psql -h host -p port -U username database

# Connect to database; user will be prompted for password:
psql -h host -p port -U username -W database

# Execute a single SQL query or PostgreSQL command on the given database (useful in shell scripts):
psql -c 'query' database

# Execute commands from a file on the given database:
psql database -f file.sql

# See also:
#   pg_dump, pg_restore, pg_top
#   PostgreSQL cheat sheets at /psql/
#   list of pages:      /psql/:list
#   search in pages:    /psql/~keyword