请看一下我的 MySQL 子句。
UPDATE `users_words` SET `priority` = (SELECT MAX(`priority`)+1 FROM `users_words`) where `userid` = 89 AND `wordid`="agree"
这里我要更新priority字段的现有最大值 priority 加 1字段值。但我收到错误 You can't specify target table 'users_words' for update in FROM clause .
如何解决这个问题？
最佳答案
只需将子查询包装在另一个 SELECT 中:
UPDATE `users_words`
SET `priority` = (SELECT x.* FROM (SELECT MAX(`priority`)+1 FROM `users_words`) x)
WHERE `userid` = 89 AND `wordid`="agree"
关于MySQL错误: You can't specify target table 'users_words' for update in FROM clause，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/23770598/