Category: Postgres
You can list the extensions that are installed for Postgres database using the \dx command in psql:
my_database=# \dx;
List of installed extensions
-[ RECORD 1 ]------------------------------------------------
Name | plpgsql
Version | 1.0
Schema | pg_catalog
Description | PL/pgSQL procedural language
-[ RECORD 2 ]------------------------------------------------
Name | uuid-ossp
Version | 1.1
Schema | public
Description | generate universally unique identifiers (UUIDs)