SQLServer Row number

Delete All But Last Record (1 to Many Table)

WITH cte AS (
 SELECT ProjectID,
 ROW_NUMBER() OVER (PARTITION BY ProjectID ORDER BY InsertDate DESC) AS rn
 FROM ProjectNotes
)
DELETE FROM cte WHERE rn > 1;

Row numbers without partitions

Include a row number according to the order specified.

SELECT
 ROW_NUMBER() OVER(ORDER BY Fname ASC) AS RowNumber,
 Fname,
 LName
FROM Employees

Row numbers with partitions

Uses a partition criteria to group the row numbering according to it.

SELECT
 ROW_NUMBER() OVER(PARTITION BY DepartmentId ORDER BY DepartmentId ASC) AS RowNumber,
 DepartmentId, Fname, LName
FROM Employees

Conclusion

In this page (written and validated by A. Gawali) you learned about SQLServer Row number . What's Next? If you are interested in completing SQLServer tutorial, your next topic will be learning about: SQLServer SQL Group By vs Distinct.

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