AWS Database Migration Service (DMS) is specifically designed to help migrate databases to AWS quickly and securely. It supports migrating Oracle databases and many other commercial and open-source databases. During migration, the source database remains fully operational, minimizing downtime for applications that rely on the database.

• AWS VM Migration Service is not an actual AWS service - this might be referring to AWS Application Migration Service (formerly CloudEndure Migration) which is for server migration, not database migration.
• AWS Inspector is a security vulnerability assessment service, not for database migration.
• AWS Trusted Advisor provides optimization recommendations for cost, performance, security, and fault tolerance, but doesn't handle database migrations.