Mysql插入2个表后触发

我在创建在两个表中完成插入后执行的触发器时遇到一些问题

"insert into table_products values (NULL, '$product_name', '$product_description', '$image_path', '$brand_id', 1)";

"insert into table_product_categories values ($product_id, '$subcatty_id')";

执行这两个查询后，我想触发：

UPDATE table_product_count SET count = count + 1 WHERE brand_id = NEW.brand_id && category_id = NEW.category_id;

问题是新的.brand_id此时不可用

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如何解决此问题？

您可以使用

连接。假设
new
指的是
表中的产品类别
：

UPDATE table_product_count pc JOIN
       table_products p
       on p.product_id = pc.product_id and p.brand_id = pc.brand_id            
    SET pc.count = pc.count + 1
    WHERE p.product_id = NEW.product_id AND pc.category_id = NEW.category_id;