require 'active_record'

conn1 = ActiveRecord::Base.establish_connection(
        :adapter => 'oracle_enhanced',
        :database => "//db1",
        :username => 'user1',
        :password => 'pwd1'
    )
a = conn1.connection.exec_query("select N_WF_NIE from COMBINED")
puts a

conn2 = ActiveRecord::Base.establish_connection(
        :adapter => 'oracle_enhanced',
        :database => "db2",
        :username => 'user2',
        :password => 'pwd2'
    )
b = conn2.connection.exec_query("select MSLNN from PICAAMISC")
puts b

c = conn1.connection.exec_query("select N_NIE from AGG")
puts c