Add new column if values are the same

Hello Everyone,

I have a SQL query and I know this is just simple one but for some reasons I cannot get it to work.

What I want to accomplish is if there are 2 more columns with the same values from Column1 to Column 3 but not the same value with Column4, then add new column and insert Column4 2nd output value into NewColumn.

Is this possible or any suggestions is appreciated.

Thank you again for all your help. I really appreciate it.

See attached.
SQLTest.xlsx
Queennie LAsked:
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Scott PletcherSenior DBACommented:
SELECT
    MIN(t1.UniqueID) AS UniqueID,
    t1.Column1,
    t1.Column2,
    t1.Column3,
    MAX(CASE WHEN row_num = 1 THEN Column4 END) AS Column4,
    ISNULL(MAX(CASE WHEN row_num = 2 THEN Column4 END), '') AS NewColumn
    --,ISNULL(MAX(CASE WHEN row_num = 3 THEN Column4 END), '') AS NewColumn2, ...
FROM (
    SELECT *, ROW_NUMBER() OVER(PARTITION BY Column1, Column2, Column3 ORDER BY Column4)
    FROM dbo.table1
) AS t1
GROUP BY t1.Column1, t1.Column2, t1.Column3
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Queennie LAuthor Commented:
@Scott Pletcher:

I will test it and let you know.

Thank you again for your help.
0
Queennie LAuthor Commented:
@Scott Pletche:
It is working perfectly.

Thank you again for your help.
0
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