DBMS > Amazon DynamoDB vs. Oracle NoSQL vs. PostgreSQL
System Properties Comparison Amazon DynamoDB vs. Oracle NoSQL vs. PostgreSQL
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|Editorial information provided by DB-Engines|
|Name||Amazon DynamoDB Xexclude from comparison||Oracle NoSQL Xexclude from comparison||PostgreSQL Xexclude from comparison|
|Description||Hosted, scalable database service by Amazon with the data stored in Amazons cloud||A multi-model, scalable, distributed NoSQL database, designed to provide highly reliable, flexible, and available data management across a configurable set of storage nodes||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL|
|Primary database model||Document store|
|Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.|
|Secondary database models||Document store|
|Developer||Amazon||Oracle||PostgreSQL Global Development Group www.postgresql.org/developer|
|Initial release||2012||2011||1989 1989: Postgres, 1996: PostgreSQL|
|Current release||22.1, May 2022||14.4, June 2022|
|License Commercial or Open Source||commercial free tier for a limited amount of database operations||Open Source Proprietary for Enterprise Edition (Oracle Database EE license has Oracle NoSQL database EE covered: details)||Open Source BSD|
|Cloud-based only Only available as a cloud service||yes||no||no|
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|Server operating systems||hosted||Linux|
|Data scheme||schema-free||Support Fixed schema and Schema-less deployment with the ability to interoperate between them.||yes|
|Typing predefined data types such as float or date||yes||optional||yes|
|XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.||no||yes specific XML-type available, but no XML query functionality.|
|SQL Support of SQL||no||SQL-like DML and DDL statements||yes standard with numerous extensions|
|APIs and other access methods||RESTful HTTP API||RESTful HTTP API||ADO.NET|
native C library
streaming API for large objects
|Supported programming languages||.Net|
|Server-side scripts Stored procedures||no||no||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.|
|Triggers||yes by integration with AWS Lambda||no||yes|
|Partitioning methods Methods for storing different data on different nodes||Sharding||Sharding||partitioning by range, list and (since PostgreSQL 11) by hash|
|Replication methods Methods for redundantly storing data on multiple nodes||yes||Electable source-replica replication per shard. Support distributed global deployment with Multi-region table feature||Source-replica replication other methods possible by using 3rd party extensions|
|MapReduce Offers an API for user-defined Map/Reduce methods||no may be implemented via Amazon Elastic MapReduce (Amazon EMR)||with Hadoop integration||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency|
Immediate Consistency can be specified for read operations
Immediate Consistency depending on configuration
|Foreign keys Referential integrity||no||no||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID ACID across one or more tables within a single AWS account and region||configurable ACID within a storage node (=shard)||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes off heap cache||no|
|User concepts Access control||Access rights for users and roles can be defined via the AWS Identity and Access Management (IAM)||Access rights for users and roles||fine grained access rights according to SQL-standard|
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|Amazon DynamoDB||Oracle NoSQL||PostgreSQL|
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