转载自：https://blog.csdn.net/chengyuqiang/column/info/18392，ES版本号6.3.0
增加两条文档
PUT my-index/persion/5
{
"name":"程裕强",
"age":28,
"salary":10000
}
PUT my-index/persion/6
{
"name":"hadron",
"age":19,
"salary":5000
}max
GET my-index/_search
{
"size": 0,
"aggs": {
"max_age": {
"max": {"field": "age"}
}
}
}返回结果
{
"took": 3,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"max_age": {
"value": 28
}
}
}min
GET my-index/_search
{
"size": 0,
"aggs": {
"min_age": {
"min": {"field": "age"}
}
}
}返回结果
{
"took": 3,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"min_age": {
"value": 19
}
}
}avg
GET my-index/_search
{
"size": 0,
"aggs": {
"avg_salary": {
"avg": {"field": "salary"}
}
}
}返回
{
"took": 3,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"avg_salary": {
"value": 7166.666666666667
}
}
}sum
GET my-index/_search
{
"size": 0,
"aggs": {
"sum_salary": {
"sum": {"field": "salary"}
}
}
}返回
{
"took": 3,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"sum_salary": {
"value": 43000
}
}
}stats
GET my-index/_search
{
"size": 0,
"aggs": {
"stats_salary": {
"stats": {"field": "salary"}
}
}
}返回结果
{
"took": 21,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"statssalary": {
"count": 6,
"min": 5000,
"max": 10000,
"avg": 7166.666666666667,
"sum": 43000
}
}
}GET my-index/_search
{
"size": 0,
"aggs": {
"stats_salary": {
"extended_stats": {"field": "salary"}
}
}
}返回
{
"took": 10,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"stats_salary": {
"count": 6,
"min": 5000,
"max": 10000,
"avg": 7166.666666666667,
"sum": 43000,
"sum_of_squares": 325000000,
"variance": 2805555.5555555522,
"std_deviation": 1674.9792701868141,
"std_deviation_bounds": {
"upper": 10516.625207040295,
"lower": 3816.7081262930387
}
}
}
}基数统计(类似sql中 count（distinct）)
GET my-index/_search
{
"size":0,
"aggs": {
"class_salary": {
"cardinality": {
"field": "salary"
}
}
}
}返回结果
{
"took": 34,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"class_salary": {
"value": 4
}
}
}可以理解为这些员工有哪些工资(工资的类型)
文档数量统计
GET my-index/_search
{
"size": 0,
"aggs": {
"doc_count": {
"value_count": {
"field": "salary"
}
}
}
}返回结果
{
"took": 5,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"doc_count": {
"value": 6
}
}
}统计包含某一字段的文档数量
百分位统计
GET my-index/_search
{
"size": 0,
"aggs": {
"persion_salary": {
"percentiles": {
"field":"salary"
}
}
}
}返回结果
{
"took": 11,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"skipped": 0,
"failed": 0
},
"hits": {
"total": 6,
"max_score": 0,
"hits": []
},
"aggregations": {
"persion_salary": {
"values": {
"1.0": 5000,
"5.0": 5000,#超过95%的人工资高于5000
"25.0": 6000,
"50.0": 7000,
"75.0": 8000,
"95.0": 10000,
"99.0": 10000
}
}
}
}