Many times you create an AWS Glue ETL job where you need to merge the records in the target Amazon Redshift table. Merge means - if the source and target records match, update the records and if don't match inserts the records. Learn how you can leverage Redshift native integration with AWS Glue Studio to create such as job.
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AWS Tutorials - Merge Operation in Amazon Redshift using AWS Glue ETL Job
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