elasticsearch查询

（1）简单查询

curl -XGET http://127.0.0.1:9201/_search
curl -XGET http://127.0.0.1:9201/test231208/_search
curl -XGET http://127.0.0.1:9201/test231208/_doc/_search
curl -XGET http://127.0.0.1:9201/test231208/_doc/id

（2）match、match_all、multi_match查询，模糊查询，即先分词后查询；match_all查询全部数据；match针对一个field做查询，multi_match针对多个field做查询，任意一个字段符合条件就行

curl -XGET http://127.0.0.1:9201/test231208/_search -d 
'{
	"query": {
		"match": {
			"name": "jerry"
		}
	}
}'
curl -XGET http://127.0.0.1:9201/test231208/_search -d 
'{
	"query": {
		"match_all": {}
	}
}'
curl -XGET http://127.0.0.1:9201/test231208/_search -d 
'{
	"query": {
		"multi_match": {
			"query": "jerry",
			"fields": [
				"name"
			]
		}
	}
}'

（3）term查询或range查询，精确查询

curl -XGET http://127.0.0.1:9201/test231208/_search -d 
'{
	"query": {
		"term": {
			"age": 2
		}
	}
}'
curl -XGET http://127.0.0.1:9201/test231208/_search -d 
'{
	"query": {
		"range": {
			"age": {
				"gte": 3,
				"lte": 4
			}
		}
	}
}'

（4）bool查询，一个或多个查询子句的组合，must表示必须匹配（类似与）、should表示选择性匹配（类似或）、must_not表示必须不匹配（类似非）、filter表示过滤条件

curl -XGET http://127.0.0.1:9201/test231208/_search -d 
'{
	"query": {
		"bool": {
			"must": [
				{
					"match": {
						"name": "tom"
					}
				},
				{
					"match": {
						"age": 2
					}
				}
			],
			"should": [
				{
					"match": {
						"name": "tom"
					}
				},
				{
					"match": {
						"name": "jerry"
					}
				}
			],
			"must_not": [
				{
					"match": {
						"name": "diana"
					}
				}
			],
			"filter": [
				{
					"range": {
						"age": {
							"gte": 2,
							"lte": 4
						}
					}
				}
			]
		}
	}
}'

（5）查询部分属性字段、分页和排序

curl -XGET http://127.0.0.1:9201/test231208/_search -d 
'{
	"query": {
		"match_all": {}
	},
	"_source": {
		"includes": [
			"age",
			"name"
		]
	},
	"from": 0,
	"size": 10,
	"sort": [
		{
			"age": {
				"order": "asc"
			}
		}
	]
}'

（6）group by分组

curl -XGET http://127.0.0.1:9201/test231208/_search -d 
'{
	"query": {
		"range": {
			"gmt_create": {
				"gte": "20230101000000",
				"lte": "20240101000000"
			}
		}
	},
	"from": 0,
	"size": 0,
	"sort": [],
	"aggs": {
		"group_by_key": {
			"terms": {
				"field": "age"
			}
		}
	}
}'

响应体，如下

{
    "took": 7,
    "timed_out": false,
    "_shards": {
        "total": 1,
        "successful": 1,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": {
            "value": 2,
            "relation": "eq"
        },
        "max_score": null,
        "hits": []
    },
    "aggregations": {
        "group_by_key": {
            "doc_count_error_upper_bound": 0,
            "sum_other_doc_count": 0,
            "buckets": [
                {
                    "key": 2,
                    "doc_count": 1
                },
                {
                    "key": 4,
                    "doc_count": 1
                }
            ]
        }
    }
}