Basic queries

Elasticsearch has extensive search and data analysis capabilities that are exposed in the form of different queries, filters, and aggregates, and so on. In this section, we will concentrate on the basic queries provided by Elasticsearch.

The term query

The term query is one of the simplest queries in Elasticsearch. It just matches the document that has a term in a given field—the exact, not analyzed term. The simplest term query is as follows:

{
  "query" : {
    "term" : {
      "title" : "crime"
    }
  }
}

The preceding query will match the documents that have the crime term in the title field. Remember that the term query is not analyzed, so you need to provide the exact term that will match the term in the indexed document. Please note that in our input data, we have the title field with the Crime and Punishment term, but we are searching for crime because the Crime term becomes crime after analysis during indexing.

In addition to the term we want to find, we can also include...