Create an AWS Identity and Access Management (IAM) role to authorize the Amazon Redshift cluster access to the external data catalog and data files in Amazon S3.
Associate the IAM Role with the specified Amazon Redshift cluster.
Create an external schema.
Provide Amazon Redshift Role ARN for the IAM Role in the external schema.
Create an external table within the external schema and specify the Amazon S3 location from where you want to read the data. For more information about creating external tables, see the AWS documentation.