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How do I find duplicates in Elasticsearch?

Author

James Holden

Published Mar 07, 2026

How do I find duplicates in Elasticsearch?

Using elasticsearch to find duplicates in dataset
  1. load the data from some csv files.
  2. normalize the fields (phone numbers, addresses)
  3. load the data into elasticsearch.
  4. run a bunch of queries on the data to find/remove/merge the duplicates.
  5. export the data back into csv.

Thereof, how do I remove duplicates in Elasticsearch?

Thanx. Depending on the number of your duplicate, search duplicate _id and their index and then loop through them and do DELETE on the doc id as it appear only to delete one of the duplicate. Thank You.

Furthermore, how do I check my elastic search data? You can use the search API to search and aggregate data stored in Elasticsearch data streams or indices. The API's query request body parameter accepts queries written in Query DSL. The following request searches my-index-000001 using a match query. This query matches documents with a user.id value of kimchy .

Besides, how do I get unique values in Elasticsearch?

You can user terms aggregation to get distinct values from your _source. As you have mentioned you don't want any other data from _source hence you can give size=0. This will give you all unique Gender values with their count in the response.

How do I remove duplicates in Kibana?

1 Answer. You can't use Kibana to delete documents. For that you'll have to go through the delete API. To do so you'll have to retrieve the id of the documents you want to delete and then use the api.

How can I get distinct values in Kibana?

  1. 3 Answers. I have been playing around with Kibana4 since a couple of weeks now.
  2. Get unique count. Create the visualization (Visualize -> Data Table).
  3. Set the aggregation right. Set you aggregation back to count and have a Split Rows as follows.
  4. Verification:

How do I capture a specific field in Elasticsearch?

Retrieve selected fields from a searchedit
  1. Use the docvalue_fields parameter to get values for selected fields.
  2. Use the stored_fields parameter to get the values for specific stored fields (fields that use the store mapping option).

What is cardinality in Kibana?

Cardinality aggregationedit. A single-value metrics aggregation that calculates an approximate count of distinct values. Values can be extracted either from specific fields in the document or generated by a script.

What is faceting in Elasticsearch?

Faceted search refers to a way to explore large amounts of data by displaying summaries about various partitions of the data and later allowing to narrow the navigation to a specific partition. In Elasticsearch, facets are also the name of a feature that allowed to compute these summaries.

How do I get all Elasticsearch documents?

Introduction
  1. You can use cURL in a UNIX terminal or Windows command prompt, the Kibana Console UI, or any one of the various low-level clients available to make an API call to get all of the documents in an Elasticsearch index.
  2. All of these methods use a variation of the GET request to search the index.

How do you find elastic?

To access the full suite of search capabilities, you use the Elasticsearch Query DSL to specify the search criteria in the request body. You specify the name of the index you want to search in the request URI.

What is elastic search and how it works?

Elasticsearch takes in unstructured data from different locations, stores and indexes it according to user-specified mapping (which can also be derived automatically from data) and makes it searchable. Its distributed architecture makes it possible to search and analyze huge volumes of data in near real time.

How do I view Kibana logs?

Viewing logs in Kibana is a straightforward two-step process.
  1. Step 1: create an index pattern. Open Kibana at kibana.example.com . Select the Management section in the left pane menu, then Index Patterns .
  2. Step 2: view the logs. Navigate to the Discover section in the left pane menu.
First of all, you need Elasticsearch. Follow the documentation instructions to download the latest version, install it and start it. Basically, you need a recent version of Java, download and install Elasticsearch for your Operating System, and finally start it with the default values - bin/elasticsearch.

How do I show all indexes in Elasticsearch?

You can query localhost:9200/_status and that will give you a list of indices and information about each.

How do I view Elasticsearch data in Kibana?

Open the main menu, then click Stack Monitoring. If data collection is disabled, you are prompted to turn on data collection. If Elasticsearch security features are enabled, you must have manage cluster privileges to turn on data collection.

How fetch data from Elasticsearch to Kibana?

To configure the Elasticsearch indices you want to access with Kibana: Point your browser at port 5601 to access the Kibana UI. For example, localhost:5601 or . Specify an index pattern that matches the name of one or more of your Elasticsearch indices.

How do I monitor Elasticsearch with Kibana?

You can drill down into the status of your Elasticsearch cluster in Kibana by clicking the Overview, Nodes, Indices and Logs links on the Stack Monitoring page. See also Monitor a cluster.

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