Display the sum along with a three-month moving average of the production of milk across the regions

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Display the sum along with a three-month moving average of the production of milk across the regions for the 2006-2010 period starting with January and ending in December?
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Data Modeling and Database Design

ISBN: 978-1285085258

2nd edition

Authors: Narayan S. Umanath, Richard W. Scammel

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