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105 lines
2.3 KiB
Markdown
105 lines
2.3 KiB
Markdown
---
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slug: /en/sql-reference/table-functions/mongodb
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sidebar_position: 135
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sidebar_label: mongodb
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---
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# mongodb
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Allows `SELECT` queries to be performed on data that is stored on a remote MongoDB server.
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**Syntax**
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``` sql
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mongodb(host:port, database, collection, user, password, structure [, options])
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```
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**Arguments**
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- `host:port` — MongoDB server address.
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- `database` — Remote database name.
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- `collection` — Remote collection name.
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- `user` — MongoDB user.
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- `password` — User password.
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- `structure` - The schema for the ClickHouse table returned from this function.
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- `options` - MongoDB connection string options (optional parameter).
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:::tip
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If you are using the MongoDB Atlas cloud offering please add these options:
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```
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'connectTimeoutMS=10000&ssl=true&authSource=admin'
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```
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:::
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Also, you can connect by URI:
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``` sql
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mongodb(uri, collection, structure)
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```
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**Arguments**
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- `uri` — Connection string.
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- `collection` — Remote collection name.
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- `structure` — The schema for the ClickHouse table returned from this function.
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**Returned Value**
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A table object with the same columns as the original MongoDB table.
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**Examples**
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Suppose we have a collection named `my_collection` defined in a MongoDB database named `test`, and we insert a couple of documents:
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```sql
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db.createUser({user:"test_user",pwd:"password",roles:[{role:"readWrite",db:"test"}]})
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db.createCollection("my_collection")
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db.my_collection.insertOne(
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{ log_type: "event", host: "120.5.33.9", command: "check-cpu-usage -w 75 -c 90" }
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)
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db.my_collection.insertOne(
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{ log_type: "event", host: "120.5.33.4", command: "system-check"}
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)
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```
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Let's query the collection using the `mongodb` table function:
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```sql
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SELECT * FROM mongodb(
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'127.0.0.1:27017',
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'test',
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'my_collection',
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'test_user',
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'password',
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'log_type String, host String, command String',
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'connectTimeoutMS=10000'
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)
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```
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or:
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```sql
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SELECT * FROM mongodb(
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'mongodb://test_user:password@127.0.0.1:27017/test?connectionTimeoutMS=10000',
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'my_collection',
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'log_type String, host String, command String'
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)
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```
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**See Also**
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- [The `MongoDB` table engine](/docs/en/engines/table-engines/integrations/mongodb.md)
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- [Using MongoDB as a dictionary source](/docs/en/sql-reference/dictionaries/index.md#mongodb)
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