Get the latest date for each record

Question

I have a History table (like a log) that records changes to parts:

TransactionID    Part ID          Description        Last Updated
1                1                   


        

Answer 1

SELECT t.TransactionID, t.PartID, t.Description, t.LastUpdated
FROM History t
JOIN (SELECT PartID, MAX(TransactionID)
FROM History
GROUP BY PartID) t2 ON t.PartID = t2.PartID
AND t.TransactionID = t2.TransactionID

will also work.