tldr/pages/common/psql.md

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}}