MySQL Round 1583

Question

所以我使用了一個公式，然後我在最後改變了代碼的別名。我如何捨棄這個別名？我試圖在整個方程上使用循環函數，但無濟於事，我得到了錯誤＃1583。

下面的代碼：

select product_name, list_price, discount_percent, 
     (.01 * discount_percent) * list_price as ROUND(discount_amount,2), 
     list_price - (.01 * discount_percent) * list_price as net_price 
from products; 

我想net_price和DISCOUNT_AMOUNT值進行四捨五入。

Answer 1

嘗試：

select product_name, list_price, discount_percent, 
     ROUND((.01 * discount_percent) * list_price, 2) as discount_amount, 
     ROUND(list_price - (.01 * discount_percent) * list_price, 2) as net_price 
from products;