Elastic Search of Count API (get the number of records that meet the criteria)

Part Speaking elastic search (referred es) commonly used search api, but sometimes we do not need the original document data to meet the conditions, but need to return the number of documents in line with the conditions, similar to the mysql select count (*) query bar number, a count query api es in the endpoint is "_count", the following example:

Node that is returned count represents the number of qualifying matches. "_Count" Support for multiple simultaneous queries index number of qualifying matches:

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 References: Es official document https://www.elastic.co/guide/en/elasticsearch/reference/current/search-count.html