delete from  device;
delete from  device_alarm;
delete from  device_channel;
delete from  device_mobile_position;
delete from  gb_stream;
delete from  log;
delete from  media_server;
delete from  parent_platform;
delete from  platform_catalog;
delete from  platform_gb_channel;
delete from  platform_gb_stream;
delete from  stream_proxy;
delete from  stream_push;