pgComparator is a tool to compare possibly very big tables in different locations and report differences, with a network and time-efficient approach.
The PostgreSQL table comparatorproject is a PostgreSQL Community project that is a part of the pgFoundry.
The pgFoundry page for the project is at http://pgfoundry.org/projects/pg-comparator, where you can find downloads, documentation, bug reports, mailing lists, and a whole lot more.
You can have access at the documentation
