I am trying parse data from three tables. In one table I have MAC_ADDR and HOST_NAME info, the second table has MAC_ADDR IP_ADDR NEIGHBOR_ADDR PORT and the third has IF_MAC DEVICE_NAME.  The field names are as above. I use join for the first two table the following way:     search router_table | join mac_addr [ search dhcp_table ] | table mac_addr host_name neighbor_mac ip_addr port        Now I want to search table 3 having fields IF_MAC and DEVICE_NAME where I want to search (if_mac=neighbor_mac) and append device_name. I tried appendcols but I can't pass the neighbor_mac as an argument to the third subsearch. Can anyone help me figure out a way to add the result of the third search? ... View more