DBMS > Amazon DocumentDB vs. Microsoft SQL Server vs. PostgreSQL vs. UniData,UniVerse
System Properties Comparison Amazon DocumentDB vs. Microsoft SQL Server vs. PostgreSQL vs. UniData,UniVerse
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|Editorial information provided by DB-Engines|
|Name||Amazon DocumentDB Xexclude from comparison||Microsoft SQL Server Xexclude from comparison||PostgreSQL Xexclude from comparison||UniData,UniVerse Xexclude from comparison|
|Description||Fast, scalable, highly available, and fully managed MongoDB-compatible database service||Microsofts relational DBMS||Widely used open source RDBMS Developed as objectoriented DBMS (Postgres), gradually enhanced with 'standards' like SQL||MultiValue database and application server with SQL mapping layer and meta database capabilities|
|Primary database model||Document store||Relational DBMS||Relational DBMS with object oriented extensions, e.g.: user defined types/functions and inheritance. Handling of key/value pairs with hstore module.||Multivalue DBMS|
|Secondary database models||Document store|
|Developer||Microsoft||PostgreSQL Global Development Group www.postgresql.org/developer||Rocket Software|
|Initial release||2019||1989||1989 1989: Postgres, 1996: PostgreSQL||1985|
|Current release||SQL Server 2019, November 2019||12.1, November 2019|
|License Commercial or Open Source||commercial||commercial restricted free version is available||Open Source BSD||commercial|
|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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|Server operating systems||hosted||Linux|
|Typing predefined data types such as float or date||yes||yes||yes||optional|
|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||yes specific XML-type available, but no XML query functionality.|
|SQL Support of SQL||no||yes||yes standard with numerous extensions||yes|
|APIs and other access methods||proprietary protocol using JSON (MongoDB compatible)||ADO.NET|
Tabular Data Stream (TDS)
native C library
streaming API for large objects
|Java API JPA|
RESTful HTTP API
|Supported programming languages||Go|
Basic U2 Basic
|Server-side scripts Stored procedures||no||Transact SQL, .NET languages, R, Python and (with SQL Server 2019) Java||user defined functions realized in proprietary language PL/pgSQL or with common languages like Perl, Python, Tcl etc.||yes|
|Triggers||no||yes||yes||yes U2 Basic|
|Partitioning methods Methods for storing different data on different nodes||none||tables can be distributed across several files (horizontal partitioning); sharding through federation||partitioning by range, list and (since PostgreSQL 11) by hash||none|
|Replication methods Methods for redundantly storing data on multiple nodes||Multi-availability zones for high availability, asynchronous replication for up to 15 read replicas||yes, but depending on the SQL-Server Edition||Master-slave replication other methods possible by using 3rd party extensions||Master-slave replication|
|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||Immediate Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no typically not used, however similar functionality with DBRef possible||yes||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||Atomic single-document operations||ACID||ACID||ACID configurable|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||yes||yes|
|In-memory capabilities Is there an option to define some or all structures to be held in-memory only.||yes||no|
|User concepts Access control||Access rights for users and roles||fine grained access rights according to SQL-standard||fine grained access rights according to SQL-standard||Access rights according to SQL-standard and operating system based|
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|Amazon DocumentDB||Microsoft SQL Server||PostgreSQL||UniData,UniVerse|
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