我需要从字段中获取小于50的值

Question

我需要从字段中获取小于50的值＆＃34; cost＆＃34;所以我该怎么做？`

{
"query" :              
    {
        "field" :"cost",                              
             {              
                "lt" : 50                           
             }            
    }           
}

Answer 1

使用范围查询：

{
    "query": {
        "range": {
            "cost": {
                "lt": 50
            }
        }
    }
}

http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-range-query.html

或者您可以使用范围过滤器（结果将被缓存）。

{
    "query": {
        "filtered": {
            "query": {
                "match_all": {}
            },
            "filter": {
                "range": {
                    "cost": {
                        "lt": 50
                    }
                }
            }
        }
    }
}

http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-range-filter.html