Pasted

select hospital_code, count(*) as total, sum(more_25), sum(between_18_24), sum(between_15_17), sum(less_15) from
(select concat(city_code,'/',hospital_code) as hospital_code, 
session.id_patient, if(timestampdiff(year,dob,date)>=25 or dob = '0000-00-00',1,0) as more_25, 
if(timestampdiff(year,dob,date) between 18 and 24,1,0) as between_18_24, 
if(timestampdiff(year,dob,date) between 15 and 17,1,0) as between_15_17,
if(timestampdiff(year,dob,date) <15,1,0) as less_15 from session left join 
club_session on id_club_session=club_session.id
left join club on club.id=id_club
left join lookup_hospital on id_hospital=lookup_hospital.id
left join tracking_motherbasicinfo on tracking_motherbasicinfo.id_patient=session.id_patient
where club_type=1 and is_present=1 and date between '2017-04-01' and '2017-09-30' and session.id_patient in (select id from patient)
group by session.id_patient)x
group by hospital_code