Wordpress Connect with Postgreesql

Step By Step :
1). Download postgresql for wordpress : https://wordpress.org/plugins/postgresql-for-wordpress/#installation
2). Place your WordPress files in the right place on your web server.
3). Unzip the files from PG4WP and put the pg4wp directory in your /wp-content directory.
4). Copy the db.php from the pg4wp directory to wp-contentYou can modify this file to configure the database driver you wish to use Currently you can set ‘DB_DRIVER’ to ‘pgsql’ or ‘mysql’ You can also activate DEBUG and/or ERROR logs
5). Point your Web Browser to your WordPress installation and go through the traditional WordPress installation routine.
6). Open wp-config-sample.php and modify with your database connection details.
7).  Save this file as wp-config.php
8). Launch /wp-admin/install.php in your browser of choice. This will initialize the database tables required for WordPress-Pg.
9). Note the password given to you.
10).  [Optional] Follow the steps below for converting from MySQL-based WordPress

Sumber :
1). https://wordpress.org/plugins/postgresql-for-wordpress/#installation
2). http://wordpress-pg.sourceforge.net/