未知列但它確實存在？

Question

這裏是我的更新查詢：

UPDATE products 
SET products_status = 0 
WHERE (`products`.`products_id` = `products_to_categories`.`products_id` 
     and `products_to_categories`.`categories_id` = 114) 

我得到的錯誤是：

1054 - 未知列在 'where子句'

但是，當 'products_to_categories.products_id'我去了表products_to_categories有一個列products_id。

我在做什麼錯？

Answer 1

你需要查詢大概是這樣的一個：

UPDATE products 
SET products_status = 0 
WHERE products_id IN 
(SELECT products_id 
FROM products_to_categories 
WHERE categories_id = 114) 

Answer 2

得到它：

UPDATE products 
SET products_status = 0 
WHERE (SELECT products_id FROM products_to_categories 
WHERE(
`products`.`products_id` = `products_to_categories`.`products_id` and `products_to_categories`.`categories_id` = 114))