Finance wants a spreadsheet-style table: one row per country, one column per month.
Return country, jan, feb and mar: the country's revenue in January, February and March 2024, with 0 for months without orders. Include every country that has at least one order (in any month), sorted by country.
SQLite has no PIVOT keyword. Use conditional aggregation.
Schema
customers(id, name, country, signup_date)
orders(id, customer_id, order_date, total)