SQL queries always return you the rows that strictly match the criteria. ... As a result, there is a lot of use to know whether a document has any certain field or not.
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elasticsearch-query-return-specific-fields
Example 2: Use field name(s) to retrieve only specific fields: SELECT ... In this sample query, acc is an alias for the accounts index: SELECT ... The default behavior of Elasticsearch is to return nulls or missing fields at the end. To push them ... 939c2ea5af
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