PostgreSQL Cheat Sheet

List PostgreSQL Databases

postgres=# \l

List PostgreSQL Schemas

postgres=# \dn

List PostgreSQL Tables

postgres=# \dt

List PostgreSQL Users

postgres=# \du

Find PostgreSQL Active Connection

postgres=# SELECT * FROM pg_stat_activity WHERE datname = '<database_name>';

Terminate All Active Connections in Database

postgres=# SELECT pg_terminate_backend (pid) FROM pg_stat_activity WHERE pg_stat_activity.datname = '<database_name>';

Check If The Server is Postgres Master or Slave

postgres=# SELECT pg_is_in_recovery();

If it's true, we're on a slave; if false, we're in master.

Delete or Drop User from Database

postgres=# DROP USER IF EXISTS <user_name_1>, <user_name_2>, ..., <user_name_n>;

Delete or Drop Database

postgres=# DROP DATABASE IF EXISTS <database_name>;