1、添加源:

sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'

2、导入KEY:

wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -

3、更新源:

sudo apt-get update

4、安装最新版PostgreSQL.

If you want a specific version, use 'postgresql-12' or similar instead of 'postgresql':

sudo apt-get -y install postgresql

Included in distribution
Debian includes PostgreSQL by default. To install PostgreSQL on Debian, use the (or other apt-driving) command: apt-get
apt-get install postgresql-12
The repository contains many different packages including third party addons. The most common and important packages are (substitute the version number as required):
postgresql-client-12 client libraries and client binaries
postgresql-12 core database server
libpq-dev libraries and headers for C language frontend development
postgresql-server-dev-12 libraries and headers for C language backend development