Compare data for 4 columns

1

Hi,

Can anybody please help with a SQL query to compare 4 column values between 2 tables to check if any data changes have taken place for a unique row ID ?

Many thanks.

2

Assuming that NULLs are not relevant here, then:

SELECT t1.id, t1.col1, t2.col1, t1.col2, t2.col2, t1.col3, t2.col3, t1.col4, t2.col4
FROM dbo.table1 t1
INNER JOIN dbo.table2 t2 ON t2.id = t1.id AND
    ((t2.col1 <> t1.col1) OR (t2.col2 <> t1.col2) OR
     (t2.col3 <> t1.col3) OR (t2.col4 <> t1.col4))
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