[英]Can't use a sub-query inside an UPDATE query?
当我使用此查询时,MySQL显示“HY000”错误:“您无法在FROM子句中为更新指定目标表'msg_pv'”。
问题似乎是查询和子查询的目标是同一个表......但这是我需要做的!
<?php $requete = $pdo->prepare('UPDATE msg_pv SET
lu=:lu
WHERE id_ref_msg = :id_ref_msg AND date_message > ( SELECT MIN(date_message) FROM msg_pv WHERE id_ref_msg = :id_ref_msg AND lu="0" )');
注意:我已经在INNER JOIN的其他帖子中阅读了一些解决方案,但它适用于不同的表格。
试试这样吧
UPDATE
msg_pv AS t1
CROSS JOIN (
SELECT MIN(date_message) AS date_message FROM msg_pv
WHERE id_ref_msg = :id_ref_msg AND lu="0"
) AS t2
SET
t1.lu = :lu
WHERE
t1.date_message > t2.date_message
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.