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Master #3

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5 changes: 3 additions & 2 deletions Order and Deliver/# 1251. Average Selling Price.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,8 @@
# For each product_id there will be no two overlapping periods. That means there will be no two intersecting periods for the same product_id.

SELECT p.product_id, ROUND(SUM(u.units*p.price)/SUM(u.units),2) AS average_price
FROM Prices p JOIN UnitsSold u USING(product_id)
WHERE u.purchase_date BETWEEN p.start_date AND p.end_date
FROM Prices p LEFT JOIN UnitsSold u
ON p.product_id = u.product_id
AND u.purchase_date BETWEEN p.start_date AND p.end_date
GROUP BY 1
;