SUM (seconds) OVER (PARTITION BY item ORDER BY start_time) AS xxxx
累積時間の計算。
SELECT duration_seconds,
SUM(duration_seconds) OVER (ORDER BY start_time) AS running_total
FROM tutorial.dc_bikeshare_q1_2012
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SUM (seconds) OVER (PARTITION BY item ORDER BY start_time) AS xxxx
累積時間の計算。
SELECT duration_seconds,
SUM(duration_seconds) OVER (ORDER BY start_time) AS running_total
FROM tutorial.dc_bikeshare_q1_2012
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