SQL ORDER BY on Update- update last record with condition

Question

I am trying to update the last record of table Log (the field with the latest TimeAccessed) given that TimeExited is null, and the computername is the same as the \"cm\" paramet

Answer 1

Access SQL doesn't use LIMIT n it uses TOP n, and as mentioned in the other question cited in the comments to your question, you aren't allowed to use TOP in the way you've described. Instead, you'll need to do something along these lines:

UPDATE Log 
SET TimeExited = CloseTime
WHERE TimeExited IS NULL 
    AND ComputerName='r2d2'
    AND TimeAccessed IN
        (
            SELECT TOP 1 TimeAccessed
            FROM Log
            WHERE TimeExited IS NULL 
                AND ComputerName='r2d2'
            ORDER BY TimeAccessed DESC
        )