思路1
SELECT s.product_id, SUM(s.quantity) AS total_quantity
FROM Sales s JOIN Product p
ON s.product_id=p.product_id
GROUP BY s.product_id;
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SELECT s.product_id, SUM(s.quantity) AS total_quantity
FROM Sales s JOIN Product p
ON s.product_id=p.product_id
GROUP BY s.product_id;
Last updated
Was this helpful?