总结一下

Question

我有一张这样的表：

Count        Product
100         apple
50          apple
20          orange

如何选择获得每件产品的总和？

Count         Product
150           apple
20           orange

Answer 1

使用SUM（），

尝试查询

 select SUM(count) as count,Product from #YourTable
 group by Product

SUM（）函数返回数字列的总和

Answer 2

您应该使用聚合函数：

    select SUM(count) as Count, Product from Product
    group by Product