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Elasticsearch: A Complete Guide by Saurabh Chhajed, Marek Rogoziński, Rafał Kuć, Bharvi Dixit

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Elasticsearch Query DSL

The queries that we saw until now were basic commands that were used to retrieve data, but the actual power of Elasticsearch's querying lies in a robust Query Domain Specific Language based on JSON also called Query DSL. Kibana makes extensive use of Query DSL in order to get results in a desired format for you. You almost never really have to worry about writing the query JSON, as Kibana will automatically create and put the results in a nice format.

For example, in order to get only three results out of all the matching ones, we can specify it like this:

curl -XPOST 'localhost:9200/logstash-*/_search' -d '
{
  "query": { "match_all": {} },
  "size": 3
}'

The response is as follows, which contains three documents matching ...

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