mySQL Update字段依赖于Select

Question

我正在尝试更新一个表中依赖于另一个表中的行的记录。像这样：

UPDATE product_description SET description="" /* Nothing! */

WHERE product.product_id=product_description.product_id AND product.manufacturer_id=1

Answer 1

UPDATE product_description 
JOIN product ON product.product_id = product_description.product_id 
SET description = "" /* Nothing! */
WHERE product.manufacturer_id = 1