====== PostgreSQL ======
===== Tworzenie bazy i użytkownika =====

<code>
CREATE DATABASE dbname;
CREATE USER username WITH PASSWORD 'user_password';
GRANT ALL PRIVILEGES ON DATABASE "dbname" to username;
</code>

Dodatkowo dla PostgreSQL 15.x i nowszych:

<code>
ALTER DATABASE dbname OWNER TO username;
</code>

Źródło: https://stackoverflow.com/questions/74110708/postgres-15-permission-denied-for-schema-public
===== Killowanie połączeń do bazy =====
PostgreSQL 9.2 i nowsze:
<code>
SELECT pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
WHERE pg_stat_activity.datname = 'TARGET_DB'
  AND pid <> pg_backend_pid();
</code>

PostgreSQL 9.1 i starsze:
<code>
SELECT pg_terminate_backend(pg_stat_activity.procpid)
FROM pg_stat_activity
WHERE pg_stat_activity.datname = 'TARGET_DB'
  AND procpid <> pg_backend_pid();
</code>

===== Przeładowanie konfiguracji =====

Dwie metody:

<code bash>
sudo -u postgres -i
pg_ctl reload
</code>

<code bash>
sudo -u postgres -i
psql
SELECT pg_reload_conf();
</code>

//Źródło: https://www.heatware.net/databases/postgresql-reload-config-without-restarting/ //