Sql Row number
Delete All But Last Record (1 to Many Table)
WITH cte AS (
ROW_NUMBER() OVER (PARTITION BY ProjectID ORDER BY InsertDate DESC) AS rn
DELETE FROM cte WHERE rn > 1;
Row numbers without partitions
Include a row number according to the order specified.
ROW_NUMBER() OVER(ORDER BY Fname ASC) AS RowNumber,
Row numbers with partitions
Uses partition criteria to group the row numbering according to it.
ROW_NUMBER() OVER(PARTITION BY DepartmentId ORDER BY DepartmentId ASC) AS RowNumber,
DepartmentId, Fname, LName
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