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Running totals with SUM

Harbr's finance team wants to track how credit consumption accumulates over time for each warehouse. You'll build a running total using SUM() as a window function on logistics.warehouse_usage, which contains warehouse_name, usage_month, and credits_used.

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100 XP

Select warehouse_name, usage_month, and credits_used.
Add a running_total column using SUM(credits_used) partitioned by warehouse_name and ordered by usage_month.

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