After reading Chapter 11a and Chapter 11b Lecture (see the attachments), “Advanced Analytics -Technology and Tools – Advanced SQL and MADlib”
• Describe how the following code will work:
SELECT dt, region, revenue,
count(*) OVER (twdw) AS moving_count,
avg(revenue) OVER (twdw) AS moving_average
FROM moving_average_data mad
WINDOW twdw AS (PARTITION BY region
ORDER BY dt RANGE BETWEEN
‘7 days’::interval PRECEDING AND
‘0 days’::interval FOLLOWING)
ORDER BY region, dt
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