1
我必须更新demo.brandname表 中的demo1列中的品牌名称,并从中选择查询然后演示错误代码:1046.没有选择数据库通过在侧栏的SCHEMAS列表中双击其名称来选择要使用的默认数据库
update my.demo1
inner join
(
select sku,brandname,product
from
(
select sku,product,brandname,count(brandname) as counter
from
(
select sku,product,brandname
from my.demo
where brandname is not null
) as derive
group by sku,product,brandname
order by counter desc
) as derive1
group by sku,product
) as ai on sku=ai.sku set brandname=ai.brandname;
ya您好ryt谢谢! –
然后接受答案是正确的 – StanislavL