---
title: "聚合函数"
date: "2022-01-30T10:22:54.000Z"
permalink: "/pages/function/aggregation/"
---
# count
* 入参:target:Object
* 返回值:int
* 函数说明:计算集合大小
var list = [1,2,3,4,5]
return count(list); // 5
# sum
* 入参:target:Object
* 返回值:Number
* 函数说明:对集合进行求和
var list = [1,2,3,4,5]
return sum(list); // 15
# max
* 入参:target:Object
* 返回值:Object
* 函数说明:求集合最大值
var list = [1,2,3,4,5]
return max(list); // 5
# min
* 入参:target:Object
* 返回值:Object
* 函数说明:求集合最小值
var list = [1,2,3,4,5]
return min(list); // 5
# avg
* 入参:target:Object
* 返回值:Object
* 函数说明:求集合平均值
var list = [1,2,3,4,5]
return min(list); // 3
# group_concat
* 入参:target:Object
* 入参:separator:String 分隔符,可省略
* 返回值:Object
* 函数说明:将集合拼接起来
var list = [1,2,3,4,5]
return group_concat(list); // "1,2,3,4,5"
// return group_concat(list,'|'); // "1|2|3|4|5"