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Aggregate surface areas and calculate cumulative surface area using the LAG function.

SQLeasy0.2 min readPremium
Frequency
Low
Asked at 1 company
Category
487
questions in SQL
Difficulty Split
130E|271M|86H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Deolite
Expert AnswerPremium
43 wordsInterview-ready
**LAG:** Previous row. LAG(surface_area, 1, 0) OVER (ORDER BY id). **Cumulative:** SUM(surface_area) OVER (ORDER BY id) or ROWS UNBOUNDED PRECEDING. SELECT id, surface_area, SUM(surface_area) OVER (ORDER BY id) AS cumulative_area, surface_area + LAG(surface_area, 1, 0) OVER (ORDER BY id) AS prev_plus_curr FROM surfaces;
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