我收到了消息“ SQLSTATE [42000]”之类的未捕获的异常“ PDOException”错误：语法错误或访问冲突：1064

Question

我的查询就像..

SELECT  oi.`sku`,oi.`product_id`, count(*) as `count1`
                FROM `order_item` AS oi RIGHT JOIN `products` AS p ON oi.`product_id` =  p.`entity_id` WHERE oi.`product_id` IN (1234,4556,7854)
                GROUP BY oi.`sku` ORDER BY `count1` DESC

我收到如下错误。

PHP致命错误：消息“ SQLSTATE [42000]”未捕获的异常“ PDOException”：语法错误或访问冲突：1064 SQL语法有错误； 请查看与您的MySQL服务器版本相对应的手册，以了解在'）GROUP BY sfoi附近使用正确的语法。 在第4行的sku ORDER BY count1 DESC'

请大家解释一下，我的查询有问题吗？

Answer 1

您应该按两列分组：oi.sku，oi.product_id

SELECT oi.sku,oi.product_id, count(*) as count1 
FROM order_item AS oi 
RIGHT JOIN products AS p ON oi.product_id = p.entity_id 
WHERE oi.product_id IN (1234,4556,7854) 
GROUP BY oi.sku,oi.product_id
ORDER BY count1 DESC