In this episode of 'Back to Basics', Anita Singh discusses database migrations using Babelfish, a tool that helps migrate applications from Microsoft SQL Server to Aurora PostgreSQL on AWS. Babelfish enables migration with minimal code changes, potentially saving up to 50% of migration effort. It supports SQL Server's TDS protocol and T-SQL language, allowing applications to maintain existing code and connectivity drivers. Anita explains how Babelfish expedites heterogeneous database migrations, comparing traditional migration patterns to those using Babelfish. This approach helps companies break free from commercial database licensing costs while meeting high availability and scalability requirements.