Помогите с запросом

group by hour having count(*)>30

select COUNT(*) as count, SUM(lead) as sum, hour, count/sum as divide FROM `real_stats` GROUP BY hour HAVING count > 30

select hour, count(*)/sum(lead),count(*),sum(lead) FROM `real_stats` WHERE count(*)>30 group by hour 

WHERE count(*)>30 

Ответ MySQL: Документация

#1111 - Invalid use of group function 

select hour, count(*)/sum(lead),count(*),sum(lead) FROM `real_stats` group by hour HAVING count(*)>30

Проблема решена!