用except语句更新 [英] Update with except statement

问题描述

这是我的查询

SELECT PageVisit_ID,TargetSite_ID FROM [A].Datawarehouse.mi.ctb_PageEvent WITH (NOLOCK)
 EXCEPT 
 SELECT PageVisit_ID ,TargetSite_ID FROM [B].Datawarehouse.mi.ctb_PageEvent WITH (NOLOCK)

来自两个服务器的这两个表.我需要从[B].Datawarehouse.mi.ctb_PageEvent更新[A].Datawarehouse.mi.ctb_PageEvent记录中的targetsite_id 仅与上述查询结果匹配.

these two tables from two servers. I need to update targetsite_id in [A].Datawarehouse.mi.ctb_PageEvent records from [B].Datawarehouse.mi.ctb_PageEvent only matched with above query results.

推荐答案

尝试一下

DECLARE @SummaryOfChanges TABLE(Change VARCHAR(20));

MERGE INTO [A].Datawarehouse.mi.ctb_PageEvent AS Target
USING ( SELECT PageVisit_ID ,TargetSite_ID FROM [B].Datawarehouse.mi.ctb_PageEvent WITH (NOLOCK)) AS SOURCE
ON Target.TargetSite_ID = Source.TargetSite_ID 
WHEN MATCHED THEN
    //UPDATE OR do nothing
WHEN NOT MATCHED BY TARGET THEN
    //INSERT 
OUTPUT $action INTO @SummaryOfChanges;

请参考 SQL SERVER –合并操作–单一执行中的插入，更新，删除.我的解决方案只是给出了如何执行此操作的基本思路.最初可能无法100％工作.只要了解了逻辑就可以对其进行调整

Please refer to SQL SERVER – Merge Operations – Insert, Update, Delete in Single Execution. my solution just gives a basic idea on how to do this. It might not work 100% initially. Just tweak it once you understand the logic

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