DBMS > Amazon DynamoDB vs. Heroic vs. PostgreSQL vs. TerminusDB
System Properties Comparison Amazon DynamoDB vs. Heroic vs. PostgreSQL vs. TerminusDB
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|Editorial information provided by DB-Engines|
|Name||Amazon DynamoDB Xexclude from comparison||Heroic Xexclude from comparison||PostgreSQL Xexclude from comparison||TerminusDB former name was DataChemist Xexclude from comparison|
|Description||Hosted, scalable database service by Amazon with the data stored in Amazons cloud||Time Series DBMS built at Spotify based on Cassandra or Google Cloud Bigtable, and ElasticSearch||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||Scalable Graph Database platform making enterprise data available by exploiting inferred entities and relationships|
|Primary database model||Document store|
|Time Series DBMS||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||Graph DBMS|
|Secondary database models||Document store|
|Developer||Amazon||Spotify||PostgreSQL Global Development Group www.postgresql.org/developer||DataChemist Ltd.|
|Initial release||2012||2014||1989 1989: Postgres, 1996: PostgreSQL||2018|
|Current release||14.5, August 2022||10.0.21, March 2022|
|License Commercial or Open Source||commercial free tier for a limited amount of database operations||Open Source Apache 2.0||Open Source BSD||Open Source GPL V3|
|Cloud-based only Only available as a cloud service||yes||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Implementation language||Java||C||Prolog, Rust|
|Server operating systems||hosted||FreeBSD|
|Typing predefined data types such as float or date||yes||yes||yes||yes|
|no||yes specific XML-type available, but no XML query functionality.||no|
|Secondary indexes||yes||yes via Elasticsearch||yes|
|SQL Support of SQL||no||no||yes standard with numerous extensions||SQL-like query language (WOQL)|
|APIs and other access methods||RESTful HTTP API||HQL (Heroic Query Language, a JSON-based language)|
native C library
streaming API for large objects
RESTful HTTP API
WOQL (Web Object Query Language)
|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.||yes|
|Triggers||yes by integration with AWS Lambda||no||yes||yes|
|Partitioning methods Methods for storing different data on different nodes||Sharding||Sharding||partitioning by range, list and (since PostgreSQL 11) by hash||Graph Partitioning|
|Replication methods Methods for redundantly storing data on multiple nodes||yes||yes||Source-replica replication other methods possible by using 3rd party extensions||Journaling Streams|
|MapReduce Offers an API for user-defined Map/Reduce methods||no may be implemented via Amazon Elastic MapReduce (Amazon EMR)||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Eventual Consistency|
Immediate Consistency can be specified for read operations
|Foreign keys Referential integrity||no||no||yes||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||no||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes||yes in-memory journaling|
|User concepts Access control||Access rights for users and roles can be defined via the AWS Identity and Access Management (IAM)||fine grained access rights according to SQL-standard||Role-based access control|
More information provided by the system vendor
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|Amazon DynamoDB||Heroic||PostgreSQL||TerminusDB former name was DataChemist|
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