![]() This flexibility allows each table row to have any number of columns at any time so that you can easily change the tables according to your business requirements without redefining the table schema. Other non-key attributes do not have any constraints, and therefore, DynamoDB can manage structured or semistructured data, including JSON documents. Data Model DynamoDBĭynamoDB is a schemaless (NoSQL) database that supports key-value and document data models, with a primary key to uniquely identify each data item in every table. This section will analyze the differences between the two databases, starting with their data models and ending with pricing details. DynamoDB and Postgres: ComparisonĪs mentioned in the overview, the main difference between DynamoDB and Postgres is that DynamoDB is a NoSQL database service while Postgres is a relational database system. However, unlike Amazon, Postgres does not offer a fully managed standard cloud service. It also supports dynamic loading and catalog-driven operations, which enables users to customize data types and functions and write code from different programming languages apart from SQL and C without recompiling the database. It supports SQL standards and concurrency, making it fully ACID-compliant by default. PostgreSQL is an object-relational database system that is open-source. Therefore, developers can use DynamoDB for applications that require complex business logic with mission-critical workloads. ![]() Unlike many NoSQL databases, it supports ACID (Atomicity, Consistency, Isolation, and Durability) transactions. In addition, as DynamoDB is serverless, it adjusts for capacity by automatically scaling tables with zero administration and supports horizontal scaling to scale across multiple servers. Since it supports key-value and document data models, developers can manage NoSQL data reliably and flexibly without a hassle. DynamoDB and Postgres: An Overview DynamoDBĪmazon DynamoDB is a fully managed, serverless, NoSQL cloud database service offered by AWS. This article will go through the differences between the two and give tips on choosing one based on your requirements. However, selecting one out of the two might depend on various criteria, specifically since DynamoDB is NoSQL while Postgres is a relational database server that supports most SQL standards. Amazon DynamoDB and Postgres are two of the most common database services used by developers.
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