Question

我有一个似乎不想作为触发器运行的SQL语句，它允许将其存储为触发器，但它不会进行任何更改，它已被添加到带有phpmyadmin on table的数据库中ebaylinked'更新后开火

CREATE TRIGGER `Update` AFTER UPDATE ON `ebaylinked`
 FOR EACH ROW UPDATE product
INNER JOIN ebaylinked e ON ebaylinked.ebay_ID = product.eBay_ID
SET product.product_stock =product.product_stock - ebaylinked.QuantitySold, 
ebaylinked.Processed=0
WHERE
ebaylinked.Processed = 1

有谁知道什么是错的？

Answer 1

不确定为什么你拥有inner join但是你可以尝试以下方法，这应该更新product_stock并在产品表中进行处理，其中产品的id =已更新的产品ID：

CREATE TRIGGER `Update` AFTER UPDATE ON `ebaylinked`
 FOR EACH ROW UPDATE product

SET product.product_stock =product.product_stock - ebaylinked.QuantitySold, 
ebaylinked.Processed=0
WHERE
ebaylinked.Processed = 1 and product.eBay_ID = new.eBay_ID

MYSql触发器不对db进行任何更改

1 个答案: