gistfile1.txt

select
        ac_u.entry_date,
        ac_u.active_users,
        sess.bootups,
        sess.sessions,
        sess.new_users  
    FROM
        ( select
            au.entry_date as entry_date,
            sum(au.counter) as active_users,
            
        from
            active_users as au 
        group by
            entry_date ) ac_u 
    join
        (
            select
                entry_datetime::date as entry_date,
                sum(bootups) as bootups,
                sum(sessions) as sessions,
                sum(new_users) as new_users 
            from
                sessions  
            group by
                entry_date 
        ) sess 
            on sess.entry_date=ac_u.entry_date