涉及两个不同目录的更新语句

Question

尝试执行当前数据库想要从昨晚的备份中提取值的单个字段的更新。应该是接近于：

update myTable 
   set status = (select status 
                   from .lastBackup.dbo.myTable as t 
                  where t.idField = idField)

帮助？

Answer 1

试试这个：

update t
    set status = b.status
    from myTable t
        inner join lastBackup.dbo.myTable b
            on t.idField = b.idField