ClickHouse/docs/zh/engines/table-engines/integrations/mongodb.md

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---
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slug: /zh/engines/table-engines/integrations/mongodb
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sidebar_position: 5
sidebar_label: MongoDB
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---
# MongoDB {#mongodb}
MongoDB 引擎是只读表引擎,允许从远程 MongoDB 集合中读取数据(`SELECT`查询)。引擎只支持非嵌套的数据类型。不支持 `INSERT` 查询。
## 创建一张表 {#creating-a-table}
``` sql
CREATE TABLE [IF NOT EXISTS] [db.]table_name
(
name1 [type1],
name2 [type2],
...
) ENGINE = MongoDB(host:port, database, collection, user, password);
```
**引擎参数**
- `host:port` — MongoDB 服务器地址.
- `database` — 数据库名称.
- `collection` — 集合名称.
- `user` — MongoDB 用户.
- `password` — 用户密码.
## 用法示例 {#usage-example}
ClickHouse 中的表,从 MongoDB 集合中读取数据:
``` text
CREATE TABLE mongo_table
(
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key UInt64,
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data String
) ENGINE = MongoDB('mongo1:27017', 'test', 'simple_table', 'testuser', 'clickhouse');
```
查询:
``` sql
SELECT COUNT() FROM mongo_table;
```
``` text
┌─count()─┐
│ 4 │
└─────────┘
```
[原始文章](https://clickhouse.com/docs/en/engines/table-engines/integrations/mongodb/) <!--hide-->