将对象按字段分组并求和，然后生成CSV报告

问题描述

如何从此json创建csv?我有:

How can I create a csv from this json? I have:

[
  {
    "name": "John",
    "cash": 5
  },
  {
    "name": "Anna",
    "cash": 4
  },
  {
    "name": "Anna",
    "cash": 3
  },
  {
    "name": "John",
    "cash": 8
  }
]

我需要按名称分组并汇总现金，然后将结果发送为.csv，例如:

I need group by name and sum the cash and send the result a .csv like:

John,13
Anna,7

谢谢！

推荐答案

JQ具有group_by作为内置函数，使用它并进行map(.cash) | add求和每个组的cash值.

JQ has group_by as a builtin, use that and do map(.cash) | add to sum cash values for each group.

group_by(.name)[] | [.[0].name, (map(.cash) | add)] | @csv

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