题解 | 确定已售出产品项 BR01 的总数
确定已售出产品项 BR01 的总数
https://www.nowcoder.com/practice/a225d8a7bc4f496283fe8e21293e841c
#聚合函数分组查询 select sum(quantity) items_ordered from OrderItems group by prod_id having prod_id = "BR01"
确定已售出产品项 BR01 的总数
https://www.nowcoder.com/practice/a225d8a7bc4f496283fe8e21293e841c
#聚合函数分组查询 select sum(quantity) items_ordered from OrderItems group by prod_id having prod_id = "BR01"
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