Use Right Tool for Right Job, Use the best data store for your data.

▪ Don't use Relational Database Everywhere

If using Relational Database for all microservices, would probably going wrong way, consider other data stores to data requirements.

▪ Don't use Single Data Store Technology, Differentiate

Choose Alternatives to relational databases; Key/value stores, Document, Search engine, Time series, Column family, Graph databases.

▪ Focus The Data Type That Need to Store

Consider the type of data that you have.

▪ Store JSON documents in No-SQL Document database.

▪ Put transactional data into a Relational SQL database.

▪ Use a time series data base for telemetry databases.

▪ Choose Blob Data Storage for blob datas.

▪ Put application logs into Elastic Search Databases.

https://aws.amazon.com/blogs/startups/picking-the-right-data-store-for-your-workload/