SAP HANA is a database that is not only a technology behind S/4 HANA, C/4 HANA and other SAP systems. The database may be a powerhouse for many other applications.
When you have multiple databases for different applications, sooner rather than later you will face a requirement to replicate data between them. SAP already has a tool for that called SDI, short for Smart Data Integration.
SAP Expert will not write a lot about that tool today, but rather pass the mic to a specialist in the area who already prepared separate blog on this topic.
I hope you will enjoy the article SMART DATA INTEGRATION (SDI) – SOURCE DATA PREPARATION by my friend and colleague Uladzimir Sakalenka.