advanced queries

Author: Timjini

app/sql/advanced_queries.sql

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+-- Vendor Profitability
+-- Highest Operational costs
+SELECT v.id AS vendor_id, v.company_name, 
+       SUM(r.commission_amount) AS total_revenue,
+       SUM(c.cost_amount) AS total_costs,
+       (SUM(r.commission_amount) - SUM(c.cost_amount)) AS net_profit
+FROM vendors v
+JOIN revenue r ON v.id = r.vendor_id
+JOIN costs c ON r.order_id = c.order_id
+GROUP BY v.id, v.company_name
+HAVING net_profit < 0
+ORDER BY net_profit ASC;
+
+--  highest number of operational issues
+SELECT v.id AS vendor_id, v.company_name,
+       COUNT(c.id) AS num_issues
+FROM vendors v
+JOIN revenue r ON v.id = r.vendor_id
+JOIN costs c ON r.order_id = c.order_id
+WHERE c.type IN ('delivery_failure', 're_attempt', 'return_fraud')
+GROUP BY v.id, v.company_name
+ORDER BY num_issues DESC
+LIMIT 10;
+
+-- Shopper Engagement 
+-- second purchase members
+SELECT s.id AS shopper_id, s.first_name, s.last_name, 
+       COUNT(o.id) AS total_orders, 
+       MAX(o.created_at) AS last_order_date
+FROM shoppers s
+JOIN orders o ON s.id = o.shopper_id
+WHERE s.is_member = TRUE
+GROUP BY s.id
+HAVING total_orders > 1
+ORDER BY last_order_date DESC;
+
+-- time spent on the portal 
+SELECT s.id AS shopper_id, 
+       SUM(t.duration_minutes) AS total_time_spent
+FROM shoppers s
+JOIN time_spent t ON s.id = t.shopper_id
+WHERE s.is_member = TRUE
+GROUP BY s.id
+ORDER BY total_time_spent DESC
+LIMIT 10;
+
+-- Product Performance 
+-- products with the highest sales
+SELECT p.id AS product_id, p.name AS product_name,
+       SUM(oi.quantity) AS total_sales
+FROM products p
+JOIN vendor_products vp ON p.id = vp.product_id
+JOIN order_items oi ON vp.id = oi.vendor_product_id
+GROUP BY p.id, p.name
+ORDER BY total_sales DESC
+LIMIT 10;
+
+-- products with high profitability
+SELECT p.id AS product_id, p.name AS product_name,
+       SUM(oi.quantity * oi.price) AS total_revenue,
+       SUM(c.cost_amount) AS total_costs,
+       (SUM(oi.quantity * oi.price) - SUM(c.cost_amount)) AS net_profit
+FROM products p
+JOIN vendor_products vp ON p.id = vp.product_id
+JOIN order_items oi ON vp.id = oi.vendor_product_id
+JOIN costs c ON oi.order_id = c.order_id
+GROUP BY p.id, p.name
+HAVING net_profit > 0
+ORDER BY net_profit DESC
+LIMIT 10;