DBMS > Microsoft Azure Cosmos DB vs. Microsoft SQL Server vs. VelocityDB
System Properties Comparison Microsoft Azure Cosmos DB vs. Microsoft SQL Server vs. VelocityDB
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|Editorial information provided by DB-Engines|
|Name||Microsoft Azure Cosmos DB former name was Azure DocumentDB Xexclude from comparison||Microsoft SQL Server Xexclude from comparison||VelocityDB Xexclude from comparison|
|Description||Globally distributed, horizontally scalable, multi-model database service||Microsofts relational DBMS||A .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)|
|Primary database model||Document store|
Wide column store
|Relational DBMS||Graph DBMS|
Object oriented DBMS
|Secondary database models||Document store|
|Current release||SQL Server 2019, November 2019||7.x|
|License Commercial or Open Source||commercial||commercial restricted free version is available||commercial|
|Cloud-based only Only available as a cloud service||yes||no||no|
|DBaaS offerings (sponsored links) Database as a Service|
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|Server operating systems||hosted||Linux|
|Any that supports .NET|
|Typing predefined data types such as float or date||yes JSON types||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||no|
|Secondary indexes||yes All properties auto-indexed by default||yes||yes|
|SQL Support of SQL||SQL-like query language||yes||no|
|APIs and other access methods||DocumentDB API|
Graph API (Gremlin)
RESTful HTTP API
Tabular Data Stream (TDS)
|Supported programming languages||.Net|
MongoDB client drivers written for various programming languages
|Partitioning methods Methods for storing different data on different nodes||Sharding Implicit feature of the cloud service||tables can be distributed across several files (horizontal partitioning); sharding through federation||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||yes Implicit feature of the cloud service||yes, but depending on the SQL-Server Edition|
|MapReduce Offers an API for user-defined Map/Reduce methods||with Hadoop integration Integration with Hadoop/HDInsight on Azure*||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Bounded Staleness|
Immediate Consistency Consistency level configurable on request level
|Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||no||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||Multi-item ACID transactions with snapshot isolation within a partition||ACID||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||yes|
|User concepts Access control||Access rights can be defined down to the item level||fine grained access rights according to SQL-standard||Based on Windows Authentication|
More information provided by the system vendor
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|3rd parties||CData: Connect to Big Data & NoSQL through standard Drivers.|
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|Microsoft Azure Cosmos DB former name was Azure DocumentDB||Microsoft SQL Server||VelocityDB|
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