每个工厂的前十大交易量

Question

我正在尝试让每个工厂根据count（*）来显示前10行，我能够拉出总的前10行，但我正在努力按工厂获得它。我从中提取的表格有50,000多个结果。

select concat(designid,productid), plantname, salesorder, so_line, 
        designid, productid, '40', datetofunction, 
        CURDATE() + INTERVAL 7 DAY, 
        stylenumber, customer, count(*) 
from packages 
where concat(designid,productid) is not null 
and pdm_complete >= CURDATE() - INTERVAL 9 MONTH 
group by concat(designid,productid) 
order by count(*) desc 
limit 10)