* Anthony R. J. Ball
>   I am trying to figure out the best way to select 
> the row of data for a specific id that is the most
> recent entry on or before a specific date.

What about:

SELECT * FROM table 
  WHERE 
    id = $specific_id AND
    date <= '$specific_date'
  ORDER BY date DESC
  LIMIT 1

-- 
Roger
query

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