postgresql-common - 225+deb11u1pureos2 main

The postgresql-common package provides a structure under which
multiple versions of PostgreSQL may be installed and/or multiple
clusters maintained at one time.
.
The commands provided are pg_conftool, pg_createcluster, pg_ctlcluster,
pg_dropcluster, pg_lsclusters, pg_renamecluster, pg_upgradecluster,
pg_virtualenv.
.
PostgreSQL is a fully featured object-relational database management
system. It supports a large part of the SQL standard and is designed
to be extensible by users in many aspects. Its features include ACID
transactions, foreign keys, views, sequences, subqueries, triggers,
outer joins, multiversion concurrency control, and user-defined types
and functions.