river1 (10/30/2012)
I think that is what is needed but we have a problem:I only want that the trigger acts if the column numeroposto new value is 'Central'. If it's not, it shoud not do any thing
Two things. The trigger will always fire on every update. You need to break your mindset that there is a single new value. It would be easy enough to add the additional where clause to the second update if that is also needed.
and i.numeroposto = 'Central'
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