> For the complete documentation index, see [llms.txt](https://karansingh.gitbook.io/aws-saa-c02/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://karansingh.gitbook.io/aws-saa-c02/disaster-recovery-and-migrations/database-migration-service-dms.md).

# Database Migration Service (DMS)

* 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**.<br>

* You **can also migrate a database from an AWS service to an on-premises database**.<br>

* 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**.<br>
* You **don't need SCT if you have the same database engine** to start off with.