[TOC]
[數據準備]
```
PUT /website/blog/1
{
"title":"Search learn",
"content":"This blog show us how to search Elasticsearch",
"status":"published",
"publish_date":"2019-01-01"
}
PUT /website/blog/2
{
"title":"Search",
"content":"We can learn more Elasticsearch here",
"status":"published",
"publish_date":"2014-01-01"
}
```
## **在多索引中搜索**
- 同時在bank，teacher 兩個索引中搜索
```
GET bank,teacher/_search?q=age:100
```
- 在所有索引中搜索
```
GET _all/_search?q=age:100
```
## **查詢所有文件**
```
GET website/_search
{
"query": {
"match_all": {}
}
}
```
## **`query` 查詢條件與 `filter` 過濾條件**
- 查詢“title”中包含“Search”，“content”中包含“Elasticsearch”，“status”為“published”，“publish_date”>2015-01-01的文檔
```
GET _search
{
"query": {
"bool": {
"must": [
{ "match": { "title": "Search" }},
{ "match": { "content": "Elasticsearch" }}
],
"filter": [
{ "term": { "status": "published" }},
{ "range": { "publish_date": { "gte": "2015-01-01" }}}
]
}
}
}
```
## **從多個字段中搜索 `multi_match`**
- 從“title”,"content"中搜索“learn”
```
GET /website/_search
{
"query": {
"multi_match": {
"query": "learn",
"fields": ["title","content"]
}
}
}
```
- 從“title”,"content"中搜索“here”
```
GET /website/_search
{
"query": {
"multi_match": {
"query": "here",
"fields": ["title","content"]
}
}
}
```
## **搜索統計 `_count
`**
```
GET /website/blog/_count
{
"query":{
"term": {"title": "learn"}
}
}
```
