题解 | 确定已售出产品的总数
确定已售出产品的总数
https://www.nowcoder.com/practice/a271dc25594a4db28f5b957aad07f9ee
select sum(quantity) as items_ordered from OrderItems;
确定已售出产品的总数
https://www.nowcoder.com/practice/a271dc25594a4db28f5b957aad07f9ee
select sum(quantity) as items_ordered from OrderItems;
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