# Register and use data catalogs in Athena
<a name="gdc-register"></a>

Athena supports mounting and connecting to multiple data catalogs. 
+ You can mount Amazon Redshift data in the AWS Glue Data Catalog and query it from Athena without having to copy or move data. For more information, see [Bringing Amazon Redshift data into the AWS Glue Data Catalog](https://docs.aws.amazon.com/lake-formation/latest/dg/managing-namespaces-datacatalog.html).
+  Connect the AWS Glue Data Catalog to external data sources using AWS Glue connections, and create federated catalogs to centrally manage permissions to the data with fine-grained access control using Lake Formation. For more information, see [Register your connection as a Glue Data Catalog](register-connection-as-gdc.md).
+ Create catalogs from Amazon S3 table buckets, and use Lake Formation to centrally manage access permissions and restrict user access to objects within the table bucket. For more information, see [Working with Amazon S3 Tables and table buckets](https://docs.aws.amazon.com/AmazonS3/latest/userguide/s3-tables.html) in the Amazon S3 User Guide.

**Note**  
For any Glue catalog, you can only register a multi-level catalog like `123412341234:my_catalog/my_child`. You cannot register a single-level catalog like `123412341234:linkcontainer` or `my_catalog`. Single-level catalogs can only be queried by using the Glue data catalog directly in the Athena query. For more information, see [Query AWS Glue data catalogs in Athena](gdc-register-query-the-data-source.md). 

**Topics**
+ [Register Redshift data catalogs in Athena](gdc-register-rs.md)
+ [Register federated catalogs in Athena](gdc-register-federated.md)
+ [Register S3 table bucket catalogs and query Tables from Athena](gdc-register-s3-table-bucket-cat.md)
+ [Query AWS Glue data catalogs in Athena](gdc-register-query-the-data-source.md)