How do I select top ranker by date in MySQL

I do have a user data base with rank.what I am looking is how do I select top rank person based on today's search开发者_如何学C?? and I need to do this in daily basis.

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This will do:

SELECT id, rank, something 
FROM person 
WHERE date = DATE(NOW()) 
ORDER BY rank DESC LIMIT 1;

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Try:

SELECT MAX(rank), id 
  FROM mytbl
 WHERE date = mydate
 GROUP BY id