How do microservices interact with database?

What database do you use for microservices?

Relational databases You'll have to start building microservices with what you have – a relational database, such as DB2, MS SQL Server, MySQL, PostgreSQL, and gradually split it into several small services. On top of that, you can use a relational database in microservices if you apply polyglot persistence.

Can microservices share a database?

In the shared-database-per-service pattern, the same database is shared by several microservices. You need to carefully assess the application architecture before adopting this pattern, and make sure that you avoid hot tables (single tables that are shared among multiple microservices).

Why do microservices have their own database?

It would allow you to pick the database technology which fits your Business requirement best in order to get the best performance or usage of it. For example some specific micro-service might have some Read-heavy operations with very complex filter options and a full text search requirement.