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Pg is the Ruby interface to the {PostgreSQL RDBMS}[http://www.postgresql.org/]. It works with {PostgreSQL 8.3 and later}[http://bit.ly/6AfPhm]. A small example usage: #!/usr/bin/env ruby require 'pg' # Output a table of current connections to the DB conn = PG.connect( dbname: 'sales' ) conn.exec( "SELECT * FROM pg_stat_activity" ) do |result| puts " PID | User | Query" result.each do |row| puts " %7d | %-16s | %s " % row.values_at('procpid', 'usename', 'current_query') end end