Hi All,
I am pretty new to elasticsearch, my project requires me to write a
group-by clause query.
I am trying to write a nested dsl using aggregation which will be like a
group by clause.
Structure of Input Document is something like this:
{
"_source": {
"id": 1234,
"oid": 6,
"education": [
{
"school_name": "Harvard",
"city" : "Boston",
"year": 1965,
"degree": "Undergrad"
},
{
"school_name": "Harvard",
"city" : "Boston",
"year": 1975,
"degree": "Masters"
},
{
"school_name": "Harvard",
"city" : "Boston",
"year": 1958,
"degree": "BA"
}
],
}
},
----Another records... and so on
*Above shown document complies to one record.
Goal: I am trying to find out all those students who studied in Boston.
So Ideally if I have only above document then I should get only 1 record.
With the nested aggregation query I have written below I am getting 3 as a
count for Boston
GET cluster_test/index_test/_search
{
"query": {
"bool": {
"must": [
{
"term": {
"oid": {
"value": "6"
}
}
}
]
}
},
"aggs": {
"education": {
"nested": {
"path": "education"
},
"aggs": {
"edu": {
"terms": {
"field": "education.city",
"size": 0
}
}
}
}
}
}
If anyone can point out where I am going wrong or what is better to deal
with these type of queries.
Any help is appreciated.
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