List the organisation id with the maximum outcome count, and the count.
create table project_outcomes (project_id varchar, PRIMARY KEY (project_id)); create table projects (organisation_id varchar, project_id varchar, PRIMARY KEY (organisation_id))
select t1.organisation_id, count(*) from projects as t1 join project_outcomes as t2 on t1.project_id = t2.project_id group by t1.organisation_id order by count(*) desc limit 1