sql - 子查询在 sql 中返回超过 1 个值

Question

当我运行它时，我有一个小查询，我收到了错误。请帮我。询问：

update MozendaData set [Sub Device]=
(select [Sub Device] from oldMozendaData 
     where MozendaData.[Product Details]=oldMozendaData.[Product Details]) 
where UserID ='APAC\gsvivekanand'

Answer 1

试试这个：

UPDATE m
SET m.[Sub Device] = o.[Sub Device] 
FROM MozendaData AS m
INNER JOIN oldMozendaData AS o ON m.[Product Details] = o.[Product Details]
WHERE m.UserID ='APAC\gsvivekanand';