查询kibana中的前n个值 [英] Query top n value in kibana
问题描述
我最近在kibana学习KQL,我想显示基于id的前n个值.在此表中,每个ID可能具有不同的覆盖范围.我希望看到每个ID的前2个最大覆盖范围.我以这张桌子为例:
I learn KQL in kibana recently, I would like to show top n values based on id. In this table, each id could have different reach. I would like to see that each ID's top 2 maximum reach. I have this table as example:
id reach
1 10
1 12
1 3
3 7
1 13
3 12
3 90
4 12
如何根据覆盖率选择前2名.目标:
How to choose top 2 based on reach. target:
id reach
1 12
1 10
3 90
3 12
4 12
如果我只想基于此来源使用最大聚合",则可以轻松地做到这一点.使用max的源使用max只会取前1个值.如果我们想取大于1的值,该怎么做?谢谢
It can be done easily if I only want top 1 using Max Aggregate based on this source. source using max using max it only take top 1 value. How do we do it if we want to take more than 1 value ? Thank you
推荐答案
您将需要使用术语聚合来获取所有唯一ID,然后进行热门匹配子聚合以使每个ID达到TOP 2:>
You'll need to use terms aggregation to get all unique IDs and then do a top-hits sub-aggregation to get TOP 2 per each ID:
{
"aggs": {
"ids": {
"terms": {
"field": "id",
"size": 3
},
"aggs": {
"top_reaches": {
"top_hits": {
"sort": [
{
"reach": {
"order": "desc"
}
}
],
"_source": {
"includes": ["reach" ]
},
"size": 2
}
}
}
}
}
}
If you knew IDs in advance, you could use _msearch to issue a query per ID:
GET test-index/_msearch
{ }
{"size":2,"query" : {"term" : 1}, "sort": [{"reach": {"order": "desc"}}]}
{ }
{"size":2,"query" : {"term" : 2}, "sort": [{"reach": {"order": "desc"}}]}
{ }
{"size":2,"query" : {"term" : 3}, "sort": [{"reach": {"order": "desc"}}]}
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