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Asked: 2026-05-11T12:45:21+00:00

I have inherited a table with a structure something like this: ID Name Timestamp

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I have inherited a table with a structure something like this:

ID   Name   Timestamp   Data ---------------------------- 1    A      40          ... 2    A      30          ... 3    A      20          ... 4    B      40          ... 5    B      20          ... 6    C      30          ... 7    C      20          ... 8    C      10          ...

ID is an identity field and the primary key and there are non-unique indexes on the Name and Timestamp fields.

What is the most efficient way to get the most recent record for each item name, i.e. in the table above rows 1,4 and 6 should be returned as they are the most up-to-date entries for items A,B and C respectively.

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1 Answer

  1. SQL Server 2005 (onwards):

    WITH MostRecentRows AS (     SELECT ID, Name, Data,     ROW_NUMBER() OVER (PARTITION BY Name ORDER BY TimeStamp DESC) AS 'RowNumber'     FROM MySchema.MyTable )  SELECT * FROM MostRecentRows  WHERE RowNumber = 1
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