Duplicate values

I have a table with 6 columns. I want to create a primary key for the first
two columns but I am getting a message that I already have duplicate values
in the combination of the two column.
Can someone help me with SQL to find the duplicate rows on two columns of
the same table ?
Thanks.SELECT T1.col1, T1.col2, T1.col3, T1.col4, T1.col5, T1.col6
FROM YourTable AS T1,
(SELECT col1, col2
FROM YourTable
GROUP BY col1, col2
HAVING COUNT(*)>1) AS T2
WHERE T1.col1 = T2.col2
AND T1.col1 = T2.col2
(untested)
--
David Portas
SQL Server MVP
--|||CORRECTION:
...
WHERE T1.col1 = T2.col1
AND T1.col2 = T2.col2
David Portas
SQL Server MVP
--|||Thanks......I found it........Now, I need to find a way to remove the
duplicates (Leave only one row).
Thanks.
"David Portas" wrote:
> CORRECTION:
> ...
> WHERE T1.col1 = T2.col1
> AND T1.col2 = T2.col2
>
> --
> David Portas
> SQL Server MVP
> --
>
>