DB Solo is a good tool for schema comparison. But it's not a command line tool.
Regards,
Ketana
________________________________
From: Javier Urbano Contreras <javier(dot)urbano(dot)contreras(at)gmail(dot)com>
To: pgsql-admin(at)postgresql(dot)org
Sent: Wednesday, 17 July 2013 11:00 AM
Subject: [ADMIN] comparison schema/data
Does anyone any tool in command line for comparison schema/data?