SELECT DISTINCT T1.date_arrived ,  T1.date_departed FROM Dogs AS T1 JOIN Treatments AS T2 ON T1.dog_id  =  T2.dog_id
What are the arriving date and the departing date of the dogs who have gone through a treatment?
SELECT DISTINCT T1.date_arrived , T1.date_departed FROM Dogs AS T1 JOIN Treatments AS T2 ON T1.dog_id = T2.dog_id
select distinct t1 . date_arrived , t1 . date_departed from dogs as t1 join treatments as t2 on t1 . dog_id = t2 . dog_id
What are the arriving date and the departing date of the dogs who have gone through a treatment ?