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Merge Statment

Posted on 2013-12-13
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Last Modified: 2013-12-15
Hi

I have merge statement like below, for eq. I have 1000 rows in t1 target , 900 rows in t2 the source and all of them in t1 target, I found DateModified has a new date for 900, so far is perfect.
But OUTPUT $action gives me 1000 for Update, why?, it should be 900 .
My script like this

Merge t1 t
Using (
select
* from t2
) As s
ON   s.ID=t.ID  
WHEN MATCHED THEN UPDATE
SET

 t.col1=s.col1,
 t.col2=s.col2,
t.DateModified=GetDate()


WHEN NOT MATCHED BY TARGET THEN  
Insert
(
t.col1,
 t.col2,
t.DateModified
)
Values (
s.col1,
 s.col2,
GetDate()
         )
WHEN NOT MATCHED BY Source THEN UPDATE
SET t.IsActive=0
 OUTPUT $action into @Actions;
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Question by:SanPrg
2 Comments
 
LVL 11

Accepted Solution

by:
Angelp1ay earned 2000 total points
ID: 39718353
For the 900 that match you're updating from source to target and for the 100 that aren't in the source you're setting t.IsActive=0.
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Author Closing Comment

by:SanPrg
ID: 39720553
Aha, Thanks.
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