基于 select SQL server 的更新语句

Question

我选择了完美的选择。

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 的更新语句。我需要在 Clients 表中更新客户 StatusID 并将其设置为 4，仅适用于此选择中最后一次取货时间超过 2 个月的客户。 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次取货是在 2 个多月前，但无法弄清楚如何仅为那些 ClientID 更改 StatusID。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())

还有，你这里有错误

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

对于 WIC=0 的任何行，此条件都为真，您可以通过这种方式进行更正

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

Answer 2

试试这个查询

对于 SQL 服务器

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()));

您的内部查询返回 1 行的多个列，您仅与 clientId 进行比较，这就是您没有得到所需结果的原因。