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STDDEV_POP

Sintassi

STDDEV_POP(espr)

Spiegazione

Restituisce la deviazione standard della popolazione di espr (la radice quadrata di VAR_POP()). E' anche possibile usare STD() o STDDEV(), che sono equivalenti ma non sono parte dell'SQL standard.

STDDEV_POP() restituisce NULL se non ci sono righe.

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