Eliminating Duplicates

I have a table with a field called PID. This field can have duplicate
values in it. I have 2 other fields called CAU and SUF. I may have 3 rows
with the same PID and same CAU, but the SUF field when concatenated with the
2 aforementioned fields make the row unique.
I want to know how to select 1 of the 3 rows but not the other 2. In
otherwords I need 1 row for each SUF. Hopes this makes sense and I would
appreciate any help.Try the following query. Work from the inner select out.
CREATE TABLE OneSUF
(
PID INT NOT NULL,
CAU INT NOT NULL,
SUF INT NOT NULL,
Description VARCHAR(255) NOT NULL
)
INSERT INTO OneSUF VALUES (1, 2, 3, '1, 2, 3')
INSERT INTO OneSUF VALUES (1, 2, 4, '1, 2, 4')
INSERT INTO OneSUF VALUES (1, 2, 5, '1, 2, 5')
INSERT INTO OneSUF VALUES (1, 3, 1, '1, 3, 1')
INSERT INTO OneSUF VALUES (1, 3, 2, '1, 3, 2')
INSERT INTO OneSUF VALUES (1, 3, 3, '1, 3, 3')
INSERT INTO OneSUF VALUES (1, 4, 3, '1, 4, 3')
INSERT INTO OneSUF VALUES (1, 4, 4, '1, 4, 4')
INSERT INTO OneSUF VALUES (1, 4, 5, '1, 4, 5')
INSERT INTO OneSUF VALUES (1, 4, 6, '1, 4, 6')
SELECT SUF3.SUF, SUF3.CAU, SUF3.PID, SUF3.Description
FROM OneSUF AS SUF3 INNER JOIN
(
SELECT SUF1.SUF, SUF1.CAU, MIN(SUF1.PID) AS PID FROM OneSUF AS SUF1 INNER
JOIN
(SELECT SUF, MIN(CAU) AS CAU FROM OneSUF GROUP BY SUF) AS SUF2
ON SUF1.SUF = SUF2.SUF AND SUF1.CAU = SUF2.CAU
GROUP BY SUF1.SUF, SUF1.CAU) AS SUF4
ON SUF3.SUF = SUF4.SUF AND SUF3.CAU = SUF4.CAU AND SUF3.PID = SUF4.PID
ORDER BY 1,2,3
--
Barry McAuslin
Look inside your SQL Server files with SQL File Explorer.
Go to http://www.sqlfe.com for more information.
"Jeff Humphrey" <jeffhumphrey@.cox-internet.com> wrote in message
news:%23OzmAYOmDHA.2416@.TK2MSFTNGP10.phx.gbl...
> I have a table with a field called PID. This field can have duplicate
> values in it. I have 2 other fields called CAU and SUF. I may have 3
rows
> with the same PID and same CAU, but the SUF field when concatenated with
the
> 2 aforementioned fields make the row unique.
> I want to know how to select 1 of the 3 rows but not the other 2. In
> otherwords I need 1 row for each SUF. Hopes this makes sense and I would
> appreciate any help.
>