I need to compare two rows ( INSERTED
& DELETED
) of the same table and compare values. And then I need to get the not matching columns. Inside a trigger.
Here what I've tried so far but I 've no idea of how to compare these two rows and get column names which contains different values .
SELECT *
FROM inserted i
INNER JOIN deleted d ON d.PurchasingDocItemNo = i.PurchasingDocItemNo
AND d.PurchasingDocNo = i.PurchasingDocNo
AND d.ReferenceDocumentNo = i.ReferenceDocumentNo
AND d.ProductNo = i.ProductNo
Change your select to :
SELECT
-- For each column you're checking. Also account for ISNull if you need to
CASE WHEN I.Col1 = D.Col1 THEN 0 ELSE 1 END AS Col1Changed.......
FROM INSERTED I
INNER JOIN DELETED D on (I.<PK> = D.<PK>)
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