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SQLServer Finding Duplicates on a Column Subset with Detail

Students with same name and date of birth


WITH CTE (StudentId, Fname, LName, DOB, RowCnt)
as (
SELECT StudentId, FirstName, LastName, DateOfBirth as DOB, SUM(1) OVER (Partition By FirstName,
LastName, DateOfBirth) as RowCnt
FROM tblStudent
)
SELECT * from CTE where RowCnt > 1
ORDER BY DOB, LName

This example uses a Common Table Expression and a Window Function to show all duplicate rows (on a subset of columns) side by side.

Conclusion

In this page (written and validated by ) you learned about SQLServer Finding Duplicates on a Column Subset with Detail . What's Next? If you are interested in completing SQLServer tutorial, your next topic will be learning about: SQLServer String Functions.



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