Average Selling Price
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n```\nSELECT\n    p.product_id,\n    COALESCE(ROUND(SUM(price * units) / SUM(units), 2), 0) AS average_price\nFROM Prices p\nLEFT JOIN UnitsSold us ON p.product_id = us.product_id\n   AND us.purchase_date BETWEEN p.start_date AND p.end_date\nGROUP BY p.product_id;\n\n```
['MySQL']