基于选择SQL服务器的更新声明

Question

我已选择完美的作品。

update ClientS set StatusID=4 
where ClientID= (select P.ClientID 
    ,LastName+' '+FirstName as Name 
    ,Address 
    ,max(p.PickupDate)as 'Last Pickup' 
    ,DATEDIFF(month,max(p.PickupDate),GETDATE())as'last pickup was months ago' 
from Pickup P 
join Clients C on P.ClientID= C.ClientID 
where WIC=0 and C.StatusID = 1 or WIC=0 and C.StatusID = 2 
group by p.clientid, lastname + ' ' + firstname,address 
order by 4) 

我需要基于此选择中的一个last pickup was months ago的更新声明。我需要在Clients表中更新客户端StatusID，并将其设置为4，仅限于此选择中最后一次取件超过2个月前的客户端。 到目前为止，我有这个

create procedure pr_UpdateStatusHwoPickupMoreThanTwoM 
AS 
update ClientS set StatusID=4 
where ClientID= (select P.ClientID 
    ,LastName+' '+FirstName as Name 
    ,Address 
    ,max(p.PickupDate)as 'Last Pickup' 
    ,DATEDIFF(month,max(p.PickupDate),GETDATE())as'last pickup was months ago' 
from Pickup P 
join Clients C on P.ClientID= C.ClientID 
where WIC=0 and C.StatusID = 1 or WIC=0 and C.StatusID = 2 
group by p.clientid, lastname + ' ' + firstname,address 
order by 4) 

我知道这是不对的，我需要以某种方式指定最后一个拍摄了2个多月前，但不能想通了如何和更改StatusID只为那些ClientID。任何想法如何做到这一点？

Answer 1

试试这个

update C 
set StatusID=4 
from (SELECT P.ClientID, MAX(p.PickupDate) MaxPickupDate 
     FROM @Pickup P 
     group by P.Clientid) P 
    join @Clients C on P.ClientID= C.ClientID 
where C.WIC=0 and C.StatusID in (1, 2) 
     AND P.MaxPickupDate<DATEADD(month,-2,GETDATE()) 

此外，你必须在这里

where WIC=0 and C.StatusID = 1 or WIC=0 and C.StatusID = 2 

错误这种情况下将真正与WIC = 0的任何行，你可以纠正这种方式

WHERE WIC=0 AND C.StatusID in (1,2) 

Answer 2

尝试此查询

对于SQL Server

update ClientS set StatusID=4 
where ClientID= (select P.ClientID 
from Pickup P 
join Clients C on P.ClientID= C.ClientID 
where WIC=0 and C.StatusID = 1 or WIC=0 and C.StatusID = 2 
group by p.clientid 
having max(p.PickupDate) < DATEADD(month,-2,GETDATE())); 

你内心的查询返回多列1行，你与只iswhy你没有得到预期的效果比较的clientId。