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a logic question


wolves

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HI
I have 3 tables

1 - culture
2 - culture_local "local to cultivate"
3 - parameters "a daily params from whater of culture_local"

there is about 12 culture_local registers
culture_local needs a culture

a culture can finish for 1 culture_local but not for other

culture
date_begin
date_end
description

culture_local
culture_id
description

parameters
date
culture_local_id
culture_id
temperature
ph
....
....


Ok, I use the culture_id from my culture_local to set culture_if for paramters
but if I'm editing an old register...
the culture_id is other for my culture_local
and I can't check for the date, because there are some cultures in the same time

what I have to do, to check the old culture?

tks
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