複雜的MySQL查詢問題

Question

我想在我的儀表板前5的產品展示，每個產品我想顯示總的順序，觀點和其中該產品是基於他人前的百分比：

Game 1 for Xbox (200 orders/1000 views) 20% 
Game 2 for WII (180 orders/2100 views) 18% 
Game 3 for PS3 (170 orders/390 views) 17% 
Game 4 for PS3 (90 orders/1400 views) 9% 
Game 5 for WII (20 orders/30 views) 2% 

因此，1000個訂單中的第1個遊戲的200個訂單佔總訂單的20％。這意味着，我的產品有20％是遊戲1

，這裏是我的查詢：

select 
products.name, products.type, products.views, count(*) as orders, ???????? 
from 
products 
inner join orders on (products.id = orders.product_id) 
group by orders.product_id 

如何獲得的百分比是多少？

Answer 1

select 
products.name, products.type, count(*) as orders, count(*) * 100/total.total as pct 
from 
products 
inner join orders on (products.id = orders.product_id) 
inner join (select count(*) as total from orders) total 
group by orders.product_id