SELECT T1.date_of_treatment ,  T2.first_name FROM Treatments AS T1 JOIN Professionals AS T2 ON T1.professional_id  =  T2.professional_id
List the date of each treatment, together with the first name of the professional who operated it.
SELECT T1.date_of_treatment , T2.first_name FROM Treatments AS T1 JOIN Professionals AS T2 ON T1.professional_id = T2.professional_id
select t1 . date_of_treatment , t2 . first_name from treatments as t1 join professionals as t2 on t1 . professional_id = t2 . professional_id
List the date of each treatment , together with the first name of the professional who operated it .