我菜鸟又问问题了，这句代码怎么改啊，怎么没有order by就对了呢
update BUS_PROD_ITEM_SN b set b.ACTION_BY = (select t.ACTION_BY from BUS_PROD_SN_LOG t limit 0,1 order by t.PRODUCT_ITEM_SN_IDX desc);

在mysql里的啊！

[解决办法]
update BUS_PROD_ITEM_SN b set b.ACTION_BY = (select t.ACTION_BY from BUS_PROD_SN_LOG t order by t.PRODUCT_ITEM_SN_IDX desc limit 0,1);
[解决办法]
order by 在 limit 之前。

update BUS_PROD_ITEM_SN b set b.ACTION_BY = (
select t.ACTION_BY from BUS_PROD_SN_LOG t order by t.PRODUCT_ITEM_SN_IDX desc limit 0,1 );
[解决办法]
记住 limit 是放在最后的
[解决办法]
对滴。。要先order by 再limit
[解决办法]
3楼正解
[解决办法]