On 15/03/07, T E Schmitz <[EMAIL PROTECTED]> wrote:(...)

  Try join the tables.

SELECT  present.day, present.low, (MIN(future.day)-present.day) as

days2fall FROM history AS present JOIN history AS future ON ( present.day <
future.day AND
     future.low <= present.low )
GROUP BY present.day,present.low
ORDER BY days2fall DESC



--
William Leite Araújo
Analista de Banco de Dados - QualiConsult

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