Athena Federated Queries

1. Introduction

AWS Athena Federated Queries allows you to query data from multiple sources using SQL. This capability enhances the analytical power of AWS Athena by enabling the integration of various data stores such as relational databases, NoSQL databases, and other data lakes.

2. Key Concepts

3. Step-by-Step Process

Follow these steps to set up and execute a federated query in AWS Athena:

1. Set up a data source connector. This can be done using AWS Glue or by creating a custom connector.
2. Configure IAM roles to allow Athena to access the data source.
3. Define the schema in AWS Glue Data Catalog.
4. Write and execute your SQL query in Athena.

Example SQL Query

SELECT * FROM "my_database"."my_table"
UNION ALL
SELECT * FROM "external_source"."external_table";
            

4. Best Practices

• Use partitioning to improve query performance.
• Optimize your data formats; Parquet and ORC formats are recommended.
• Regularly monitor and tune your federated queries for performance.

5. FAQ