change detection via EXCEPT

[Felix Möller]

Hi,

instead of the NULLIF which can quiet unreadable I prefer using the EXCEPT version of change detection. It would be great if this tool could do that as well. They are described at http://www.made2mentor.com/2013/05/writing-t-sql-merge-statements-the-right-way/ .

MERGE  #Customer_New AS Target
 USING #Customer_Orig AS Source
    ON Target.CustomerNum = Source.CustomerNum
WHEN MATCHED AND EXISTS
                    (SELECT Source.CustomerName, Source.Planet
                     EXCEPT
                     SELECT Target.CustomerName, Target.Planet)
THEN
   UPDATE SET
      Target.CustomerName = Source.CustomerName
     ,Target.Planet = Source.Planet
WHEN NOT MATCHED BY TARGET
THEN
   INSERT (CustomerNum, CustomerName, Planet)
   VALUES (CustomerNum, Source.CustomerName, Source.Planet)
WHEN NOT MATCHED BY SOURCE THEN DELETE;

[Daniel Nolan]

There's now a pull request for this issue: #106
Will complete it within a week or so if there's no issues reported.