题解 | #确定已售出产品的总数#
确定已售出产品的总数
http://www.nowcoder.com/practice/a271dc25594a4db28f5b957aad07f9ee
SELECT SUM(quantity) items_ordered FROM OrderItems;
确定已售出产品的总数
http://www.nowcoder.com/practice/a271dc25594a4db28f5b957aad07f9ee
SELECT SUM(quantity) items_ordered FROM OrderItems;
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