DELETE语句犯规拿表名称是否正确

Question

我有一个名为broodjes-service数据库，每当我运行此查询它：

DELETE FROM order_items WHERE order_id = 42 

我得到这个错误：

#1146 Table 'broodjes-service.i' doesn't exist 

虽然我” m确定该表存在，使用此表结构：

问题

我想从一个名为order_items表中删除一行，但它需要的表名i出于某种原因。

问题

• 为何需要表名i
• 我怎样才能让这个我的查询将实际上从特定表中的一行？

---

我有triggers为表order_items

这一个是删除的东西时：

UPDATE orders o 
    INNER JOIN (SELECT i.order_id id, SUM(i.quantity * p.price) total_price 
     FROM `orders-items` i 

    INNER JOIN products p ON p.id = i.products_id 
     AND i.order_id = old.order_id) t ON t.id = o.id 

SET o.total_price = t.total_price 

插入扳机

INNER JOIN (SELECT i.order_id id, SUM(i.quantity * p.price) total_price 
FROM `orders-items` i 

INNER JOIN products p ON p.id = i.products_id AND i.order_id = new.order_id) t ON t.id = o.id 

SET o.total_price = t.total_price 

更新触发

UPDATE orders o INNER JOIN (SELECT i.order_id id, SUM(i.quantity * p.price) total_price FROM `orders-items` i INNER JOIN products p ON p.id = i.products_id AND i.order_id = new.order_id) t ON t.id = o.id SET o.total_price = t.total_price 

Answer 1

DELETE FROM `broodjes-service`.order_items 
WHERE order_id = 42 

如果使用别名，然后像这样

DELETE i 
FROM `broodjes-service`.order_items i 
WHERE order_id = 42 

不要混合数据库名和别名

DELETE `broodjes-service`.i 
FROM `broodjes-service`.order_items i 
WHERE order_id = 42 

Answer 2

尝试：

Use broodjes-service; 
DELETE FROM order_items WHERE order_id = 42