Author: Aasawari Sahasrabuddhe

Data Modeling for Java Developers: Structuring With PostgreSQL and MongoDB

April 27, 2025 Aasawari Sahasrabuddhe

Application and system designs have always been considered the most essential step in application development. All the later steps and technologies to be used depend on how the system has been designed. If you are a Java developer, choosing the right approach can mean distinguishing between a rigid, complex schema and a nimble, scalable solution. If you are a Java developer who works with PostgreSQL or other relational databases, you understand the pain of representing the many-to-many relationships between the tables.

This tutorial will ease your pain with these or other relationships defined in databases by making use of a document database, MongoDB.

In this article, we’ll understand both approaches, contrasting PostgreSQL’s relational rigour with MongoDB’s document-oriented simplicity. You’ll learn how to weigh trade-offs like ACID compliance versus scalability and discover why MongoDB’s design might save you time.