MySQL#1093 - 您无法在FROM子句中为更新指定目标表'giveaways'

Question

我试过了:

UPDATE giveaways SET winner = '1' WHERE ID = (SELECT MAX(ID) FROM giveaways)

但它给出了:

#1093 - 您无法为update in FROM子句指定目标表'giveaways'

这篇文章看似相关,但我无法将其改编为我的查询.我怎样才能让它发挥作用？

Answer 1

基于您链接的文章中的信息应该有效:

update giveaways set winner='1'
where Id = (select Id from (select max(Id) as id from giveaways) as t)

Answer 2

这是因为您的更新可能是周期性的......如果更新该记录将导致事情发生这使得哪些WHERE条件FALSE？你知道情况并非如此,但引擎却没有.操作中桌面上也可能存在相反的锁定.

我认为你可以这样做(未经测试):

UPDATE
    giveaways
SET
    winner = '1'
ORDER BY
    id DESC
LIMIT 1

阅读更多

Answer 3

update giveaways set winner=1 
where Id = (select*from (select max(Id)from giveaways)as t)