Explain Query DSL in ElasticSearch.

1.	Explain Query DSL in ElasticSearch.
Answer» Elasticsearch generally provides a QUERY Domain Specific Language (DSL) BASED on JSON to DEFINE queries. Query DSL contains two kinds of clauses: Leaf query clause: A leaf query clause looks for specific values in a field or fields. They can be used independently. Matches, terms, and range queries are some examples of these queries. Compound query clause: A compound query clause is a combination of a leaf query and other compound queries. These queries combine multiple queries to produce their intended results. The BEHAVIOUR of query clauses differs depending on whether it is used in a filter CONTEXT or a query context.

Answer»

Elasticsearch generally provides a QUERY Domain Specific Language (DSL) BASED on JSON to DEFINE queries. Query DSL contains two kinds of clauses:

Leaf query clause: A leaf query clause looks for specific values in a field or fields. They can be used independently. Matches, terms, and range queries are some examples of these queries.
Compound query clause: A compound query clause is a combination of a leaf query and other compound queries. These queries combine multiple queries to produce their intended results.

The BEHAVIOUR of query clauses differs depending on whether it is used in a filter CONTEXT or a query context.

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