$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }

How to Install PostgreSQL 12 on RHEL-based Distros

GNU/Linux RHEL-based Installing PostgreSQL 12 Guide

The Tutorial shows you How to Install PostgreSQL 12 on RHEL-based GNU/Linux Distributions.

And PostgreSQL 12 for CentOS is a Powerful, Open Source Object-Relational Database System with a proven Architecture knows for its strong Reliability, Data Integrity, and Correctness.

Install PostgreSQL 12 on CentOS - Featured

GNU/Linux RHEL-based PostgreSQL 12 Database Installation Guide