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Cumulative Monthly Revenue

Show monthly revenue and a cumulative running total. For each month (YYYY-MM), display the monthly revenue from delivered orders and the cumulative revenue up to and including that month. Round to 2 decimal places. Sort chronologically.

Schema

🔑idINT
🔗customer_idINT
order_dateTEXT
statusTEXT
total_amountREAL
postgresql

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