使用 jq 填充 json 数据并打印出现次数

Question

我试图用 jq 填充下面的 json 数据并期望输出如下

{
  "data": [
    {
      "topic_name": "BookShow",
      "topic_id": "ABCDFG",
      "urgency": "high"
    },
    {
      "topic_name": "AmzonMarket",
      "topic_id": "ESDCGHY",
      "urgency": "high"
    },
    {
      "topic_name": "AmzonMarket",
      "topic_id": "ESDCGHY",
      "urgency": "high"
    },
    {
      "topic_name": "BookShow",
      "topic_id": "ABCDFG",
      "urgency": "high"
    },
    {
      "topic_name": "bookTick",
      "topic_id": "KOLPUYDD",
      "urgency": "high"
    },
    {
      "topic_name": "bookTick",
      "topic_id": "KOLPUYDD",
      "urgency": "high"
    }
  ],
  "more": false,
  "limitations": 100,
  "range": 0
}

期望输出如下，这里“出现”将是新字段，用于计算出现次数。

"id","name","occurrences"
"KOLPUYDD","bookTick",2
"ABCDFG","BookShow",2
"ESDCGHY","AmzonMarket",2

请支持。

Answer 1

用于group_by形成所需的对象分组topic_id并从中创建 CSV。

jq --raw-output '[ "id", "name", "occurrences" ], ( .data | group_by(.topic_name)[] | 
  { id: .[0].topic_id, name: .[0].topic_name, occurrences: length } | 
    [.id, .name, .occurrences]) | @csv'

jqplay演示