Yum install postgresql

yum install postgresql.x86_64
Amazon Linux 2
sudo amazon-linux-extras install postgresql10
psql: SCRAM authentication requires libpq version 10 or above

See also

• PostgreSQL: psql, .psqlrc, .pgpass, $HOME/.pg service.conf, -U, -W, -d, meta-commands: \du, \dg, \ddp, \dp, \list, \dn, \dt, \c, \l, \di, \q, show users, show, su - postgres, psql -c, \?, \connect, \conninfo, --version, --help, PL/pgSQL