DELETE語句犯規拿表名稱是否正確

Question

我有一個名爲broodjes-service數據庫，每當我運行此查詢它：

DELETE FROM order_items WHERE order_id = 42 

我得到這個錯誤：

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

雖然我」 m確定該表存在，使用此表結構：

問題

我想從一個名爲order_items表中刪除一行，但它需要的表名i出於某種原因。

問題

• 爲何需要表名i
• 我怎樣才能讓這個我的查詢將實際上從特定表中的一行？

---

我有triggers爲表order_items

這一個是刪除的東西時：

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 

插入扳機

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 

更新觸發

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 

如果使用別名，然後像這樣

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

不要混合數據庫名和別名

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

Answer 2

嘗試：

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