Hi，
> 如：select sum(distinct b,c) from orders group by a,w
sum function 的入参只能是一个，没太明白你的需求，如果是简单的去重，group by 所有需要去重的字段就可以去重：
.groupBy("a,b,c w")
.select("a, b, c”);
如果是group by分组还需要对非分组字段去重做聚合，那直接：
.groupBy("a, w")
.select("a, b.sum.distinct, c.sum.distinct”);
Best,
Leonard Xu
>
> 非常感谢！
>
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