DMS is used to migrate data from your database that is on-premises, on an RDS instance, or in a database on an EC2 instance to a database on an AWS service.
You can also migrate a database from an AWS service to an on-premises database.
DMS supports nearly all of today's most popular DBMS engines as data sources, including Oracle, Microsoft SQL Server, MySQL, MariaDB, PostgreSQL, Db2 LUW, SAP, MongoDB, and Amazon Aurora.
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DMS provides a broad coverage of available target engines including Oracle, Microsoft SQL Server, PostgreSQL, MySQL, Amazon Redshift, SAP ASE, Amazon S3, and Amazon DynamoDB.
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You can migrate from any of the supported data sources to any of the supported data targets.
Schema Conversion Tool (SCT)
Converts the source database schema and a majority of the database code objects, including views, stored procedures, and functions, to a format compatible with the target database.
You don't need SCT if you have the same database engine to start off with.