Sql server 2008 使用select查询进行SQL更新

我有一个表，其中多条记录具有相同的

LocationID

。其中一些记录在“UsedinSA”字段中具有“true”值。如果有一条对应的记录具有相同的“LocationID”和“UsedinSA”中的“true”值，我想将所有“PartofContract”值设置为“true”

我尝试了如下操作，但这只会更新已经为“true”的记录

UPDATE tbAsset
SET tbAsset.PartofContract = 1
WHERE LocationID IN (SELECT dbo.tbAsset.LocationID FROM dbo.tbasset where tbAsset.UsedinSA = 1)

作为数据示例：

合同一部分中使用的位置ID

1563110

1563100

156309 11

1563090

记录4的“PartofContract”应设置为“True”，因为记录3为，并且它们具有相同的“LocationID”

提前谢谢

---

Matt

试试这个-我只在表中添加了唯一约束，因为我假设您的表具有PK或唯一约束：

use tempdb  --somewhere safe for a sandbox
--==========================================
drop    table dbo.tbAsset
;
--create some test data
select  1 as record_id --pk
        ,156311 as LocationID 
        ,0 as UsedinSA 
        ,0 as PartofContract
into    dbo.tbAsset
union   all
select  2 as record_id 
        ,156310 as LocationID 
        ,0 as UsedinSA 
        ,0 as PartofContract
union   all
select  3 as record_id
        ,156309 as LocationID 
        ,1 as UsedinSA 
        ,1 as PartofContract
union   all
select  4 as record_id
        ,156309 as LocationID 
        ,0 as UsedinSA 
        ,0 as PartofContract
;
create  unique clustered index ix_tbAsset_record_id on dbo.tbAsset(record_id)
;
--==========================================
with was_used_in_usa as 
        (
                SELECT ass.LocationID
                FROM dbo.tbAsset ass
                WHERE ass.UsedinSA = 1
        )
update  ass
set     ass.PartofContract = 1
from    dbo.tbAsset ass
where   exists ( select  * 
                 from    was_used_in_usa 
                 where   ass.LocationID = was_used_in_usa.LocationID
               )
;  

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工作是一种享受。非常感谢你的时间、努力和帮助。