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J2112O/ifnulllag.sql

Created October 12, 2022 22:00
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ifnulllag.sql
SELECT t.id, t.start_segment, t.end_segment,
SUM(t.one_lag) OVER(ORDER BY t.id ASC) AS rolling_sum
FROM
(SELECT
id, start_segment, end_segment,
IFNULL(LAG(segment_length, 1) OVER(ORDER BY id ASC), 0) AS one_lag
FROM coords_measure) AS t;
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