DBMS > IBM Db2 vs. Microsoft SQL Server vs. Oracle
System Properties Comparison IBM Db2 vs. Microsoft SQL Server vs. Oracle
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|Editorial information provided by DB-Engines|
|Name||IBM Db2 formerly named DB2 or IBM Database 2 Xexclude from comparison||Microsoft SQL Server Xexclude from comparison||Oracle Xexclude from comparison|
|Description||Common in IBM host environments, 2 different versions for host and Windows/Linux||Microsofts flagship relational DBMS||Widely used RDBMS|
|Primary database model||Relational DBMS Since Version 10.5 support for JSON/BSON documents compatible with MongoDB||Relational DBMS||Relational DBMS|
|Secondary database models||Document store|
RDF store in Db2 LUW (Linux, Unix, Windows)
Spatial DBMS with Db2 Spatial Extender
Graph DBMS with Oracle Spatial and Graph
RDF store with Oracle Spatial and Graph
Spatial DBMS with Oracle Spatial and Graph
|Initial release||1983 host version||1989||1980|
|Current release||12.1, October 2016||SQL Server 2019, November 2019||19c, February 2019|
|License Commercial or Open Source||commercial free version is available||commercial restricted free version is available||commercial restricted free version is available|
|Cloud-based only Only available as a cloud service||no||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Implementation language||C and C++||C++||C and C++|
|Server operating systems||AIX|
|Data scheme||yes||yes||yes Schemaless in JSON and XML columns|
|Typing predefined data types such as float or date||yes||yes||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.||yes||yes|
|SQL Support of SQL||yes||yes||yes with proprietary extensions|
|APIs and other access methods||ADO.NET|
JSON style queries MongoDB compatible
Tabular Data Stream (TDS)
Oracle Call Interface (OCI)
|Supported programming languages||C|
|Server-side scripts Stored procedures||yes||Transact SQL, .NET languages, R, Python and (with SQL Server 2019) Java||PL/SQL also stored procedures in Java possible|
|Partitioning methods Methods for storing different data on different nodes||Sharding only with Windows/Unix/Linux Version||tables can be distributed across several files (horizontal partitioning); sharding through federation||Sharding, horizontal partitioning|
|Replication methods Methods for redundantly storing data on multiple nodes||yes with separate tools (MQ, InfoSphere)||yes, but depending on the SQL-Server Edition||Multi-source replication|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no can be realized in PL/SQL|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||yes||yes||yes|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||ACID isolation level can be parameterized|
|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||yes Version 12c introduced the new option 'Oracle Database In-Memory'|
|User concepts Access control||fine grained access rights according to SQL-standard||fine grained access rights according to SQL-standard||fine grained access rights according to SQL-standard|
More information provided by the system vendor
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|IBM Db2 formerly named DB2 or IBM Database 2||Microsoft SQL Server||Oracle|
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