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.
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.
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.