MySQL搭配選擇刪除

Question

我有2個表，我有點糊塗了......

 |products|       
________________________ 
| id | products_name | 
|______________________| 
| 1 | iphone4  | 
| 2 | htc desire | 
    etc............. 


    |special_price| 
________________________ 
| id | products_price| 
|______________________| 
| 1 | 400   | 
| 2 | 500   | 
    etc............. 

所有我想要做的是（？）：

DELETE (ALL) FROM special_price WHERE products_name='iphone4' 

怎麼能這樣呢？

Answer 1

你需要找到的是PRODUCT_NAME的ID（S），試試這個：

在：（複雜的病症）

DELETE FROM special_price 
WHERE id IN (SELECT id FROM products WHERE products_name = 'iphone4') 

Answer 2

試試這個：

DELETE sp FROM special_price sp 
INNER JOIN products p ON p.id = sp.id 
WHERE p.products_name = "iphone4";