elasticsearch基本查询语法笔记

基础使用

1. 启动状态

# 查看es是否正常启动
curl 'http://localhost:9200/?pretty'

2. 数据总量

# 查看总数量
GET /_count?pretty
{
"query": {
"match_all": {}
}
}

3. 根据ID查询

GET /megacorp/employee/_search?q=_id:1
GET megacorp/employee/1

4. 查询所有的数据

GET megacorp/employee/_search
{
"query": {
"match_all": {}
}
}
GET megacorp/employee/_search

5. 分词搜索及短语搜索

GET /megacorp/employee/_search?q=about:rock climbing
GET megacorp/employee/_search
{
"query": {
"match": {
"about": "rock climbing"
}
}
}

6. 搜索结果高亮显示

GET megacorp/employee/_search
{
"query": {
"match": {
"about": "rock climbing"
}
},
"highlight": {
"fields": {
"about": {}
}
}
}

7. 聚合-分组数量

GET /megacorp/employee/_search
{
"aggs": {
"test123": {
"terms": {
"field": "interests.keyword",
"size": 10
}
}
}
}

8. 聚合-平均值

GET /megacorp/employee/_search
{
"aggs": {
"age_avg": {
"avg": {
"field": "age"
}
}
}
}

9. 聚合-多层分组并求组内平均

GET /megacorp/employee/_search
{
"aggs": {
"inters": {
"terms": {
"field": "interests.keyword",
"size": 10
},
"aggs": {
"avg_age": {
"avg": {
"field": "age"
}
}
}
}
}
}