# Using a MongoDB or MongoDB Atlas connection
<a name="connection-mongodb"></a>

After you create a connection for MongoDB or MongoDB Atlas, you can use the connection in your ETL job. You create a table in the AWS Glue Data Catalog and specify the MongoDB or MongoDB Atlas connection for the `connection` attribute of the table. 

AWS Glue stores your connection `url` and credentials in the MongoDB connection. The connection URI formats are as follows:
+ For MongoDB: mongodb://host:port/database. The host can be a hostname, IP address, or UNIX domain socket. If the connection string doesn't specify a port, it uses the default MongoDB port, 27017.
+ For MongoDB Atlas: mongodb\$1srv://server.example.com/database. The host can be a hostname that follows corresponds to a DNS SRV record. The SRV format does not require a port and will use the default MongoDB port, 27017.

Additionally, you can specify options in your job script. For more information, see [MongoDB connection option reference](aws-glue-programming-etl-connect-mongodb-home.md#aws-glue-programming-etl-connect-mongodb).