left join (select p.customer_id, s.practitioner_type_id from ag_acl_practitioner p left join ag_acl_practitioner_setting s on p.id = s.practitioner_id) p
left join (select p.customer_id p_customer_id, s.practitioner_type_id from ag_acl_practitioner p left join ag_acl_practitioner_setting s on p.id = s.practitioner_id) p