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how to calculate standard deviation from a table

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Subject: how to calculate standard deviation from a table
From: Pierre Hsieh <pierre.hsieh@xxxxxxxxx>
Date: Thu, 22 Jan 2015 23:18:32 +0800

Hi

This table just has a column which type is integer. There are one million data in this table. I wanna calculate standard deviation on each 50 data by order. It means SD1 is from data 1 to data 50, SD2 is from data 51 to 100.... Is there anyone who can give me some suggestions? Thanks

Pierre

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