Question

Need help with a SQL query that returns the lasts records matching a certain criteria

我有一个类似于引用帖子中的查询。我正在尝试使用它将另一个字段设置为1，仅用于返回组和MAX结果的情况。所以我试过这个：

Update FilesTransmitted
set Accepted = 1
select MAX(f.UID) as UID, f.DocumentNumber, f.REV
from FilesTransmitted f
INNER JOIN FilesReturned r
on f.DocumentNumber = r.[Document #]
and f.REV = r.REV
where NOT(r.CODE IS NULL)
group by f.DocumentNumber, f.REV
order by f.DocumentNumber;

导致所有记录都设置了Accepted字段，而不仅仅是MAX UID记录。我知道我使用更新错误，但查询对我来说足够复杂，我只是不确定如何为更新部分构建它。

Answer 1

尝试：

Update FilesTransmitted t
   set Accepted = 1
 where t.uid = (select max(f.UID)
                  from FilesTransmitted f
                  join FilesReturned r
                    on f.DocumentNumber = r.[Document #]
                   and f.REV = r.REV
                 where r.CODE is null
                   and f.DocumentNumber = t.DocumentNumber
                   and f.rev = t.rev
                 group by f.DocumentNumber, f.REV);

Answer 2

你写的内容基本上是2个查询，添加一个空白行，你会看到我的意思：

Update FilesTransmitted
set Accepted = 1

select MAX(f.UID) as UID, f.DocumentNumber, f.REV
from FilesTransmitted f
INNER JOIN FilesReturned r
on f.DocumentNumber = r.[Document #]
and f.REV = r.REV
where NOT(r.CODE IS NULL)
group by f.DocumentNumber, f.REV
order by f.DocumentNumber;

您需要的是更新中的WHERE子句：

Update FilesTransmitted
set Accepted = 1
WHERE f.UID = ...

使用复杂的选择查询进行更新

2 个答案: