# select concat(tmp1.device_id,",",tmp1.city_id) as device_city, tmp1.merge_queue from (select device_id,if(city_id='world','worldwide',city_id) city_id,similarity_cid as merge_queue from nd_device_cid_similarity_matrix
# select concat(tmp1.device_id,",",tmp1.city_id) as device_city, tmp1.merge_queue from (select device_id,if(city_id='world','worldwide',city_id) city_id,similarity_cid as merge_queue from nd_device_cid_similarity_matrix