I need help finding record that appears in my SQL Server table more than once

Hi Experts,
I need to find the STUDENT ID # that appears in my students table more than once, how can I do this?

Thanks in advance,
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Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
Change the names to match your situation, then execute..
SELECT StudentID, COUNT(StudentID) as number_of_rows
FROM YourTable

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btw Here's an article on common GROUP BY solutions that would be a good read.
Dale FyeCommented:
SELECT * FROM tbl_Students
WHERE tbl_Students.StudentID
IN (SELECT StudentID FROM tbl_Students GROUP BY StudentID HAVING Count(StudentID) > 1)

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Try this.

Select STUDENTID, count(*) from studentstable group by STUDENTID  having  count(*) > 1

Hope this helps.
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Microsoft SQL Server

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