Question

Table:

Name | Value | Prize
Race1   32      5
Race1   22      5
Race1   30      5
Race2   11      5
Race2   12      5
Race2   31      5

What I want to query, When I define a Value 20+, The UNIQUE races (Race1, Race2) will be selected to my result, based on whose Value is higher. And prize should be summed.

So when I do metaquery : select sum(Prize) biggestValueUniqueRaces where value > -20
I get:

Query returns :

Prize
  10

Where it took into consideration these 2 rows :

Name | Value | Prize
Race1   32      5
Race2   31      5

Answer 1

Edit re comment

SELECT Sum(Races.Prize) As Total
FROM Races INNER JOIN (SELECT r.[Name], Max(r.[Value]) AS MaxOfValue
FROM Races r WHERE [Value]>20
GROUP BY r.[Name])  AS q 
ON (Races.Value = q.MaxOfValue) AND (Races.Name = q.Name);

Or

SELECT SUM(races.prize) AS SP
FROM   races
WHERE  races.id IN (
    SELECT id
    FROM   races r
    WHERE  r.name = races.name
    AND VALUE = (
       SELECT Max(VALUE)
       FROM   races s
       WHERE  s.[name] = r.name
       AND VALUE > 20 ))