-- Discount as a share of storefront subtotal, by currency
-- Discounts over subtotals of storefront orders not cancelled, by the month placed.
SELECT strftime(placed_at, '%Y-%m') AS month, currency AS grp, sum(discount_total) AS num, sum(subtotal) AS den, sum(discount_total) / NULLIF(sum(subtotal), 0) AS value FROM commerce.order WHERE placed_at >= TIMESTAMP '2023-10-01' AND placed_at < TIMESTAMP '2026-10-01' AND ((b2b_account_id IS NULL) AND (cancelled_at IS NULL)) GROUP BY 1, 2 ORDER BY 1, 2