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               SELECT
               DATE_TRUNC('month', order_date) AS month,
               SUM(CASE WHEN category = 'SaaS' THEN revenue END) AS saas,
               SUM(CASE WHEN category = 'Services' THEN revenue END) AS services,
               SUM(CASE WHEN category = 'Hardware' THEN revenue END) AS hardware,
               SUM(revenue) AS total,
               ROUND(
               (SUM(revenue) - LAG(SUM(revenue)) OVER (ORDER BY DATE_TRUNC('month', order_date)))
               / LAG(SUM(revenue)) OVER (ORDER BY DATE_TRUNC('month', order_date)) * 100, 1
                ) AS mom_growth
                FROM sales
                GROUP BY 1
                ORDER BY 1;