Enfant 0-18 ans sous arv

USE caris_db;
SET @start_date= "2017-01-01";
select count(*) from tracking_infant where
timestampdiff(year,dob,@start_date)<=18 and
(is_dead=0 or year(death_date)>=2017)
and
(is_abandoned=0 or year(abandoned_date)>=2017)

and
tracking_infant.id_patient in (
select * from(
select id_patient from tracking_followup where on_arv=1
union
select id_patient from tracking_regime
)j
)
and id_patient in (select id from patient where linked_to_id_patient=0)