DBMS > EXASOL vs. Microsoft SQL Server vs. NSDb
System Properties Comparison EXASOL vs. Microsoft SQL Server vs. NSDb
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|Editorial information provided by DB-Engines|
|Name||EXASOL Xexclude from comparison||Microsoft SQL Server Xexclude from comparison||NSDb Xexclude from comparison|
|Description||High-performance, in-memory, MPP database specifically designed for in-memory analytics.||Microsofts flagship relational DBMS||Scalable, High-performance Time Series DBMS designed for Real-time Analytics on top of Kubernetes|
|Primary database model||Relational DBMS||Relational DBMS||Time Series DBMS|
|Secondary database models||Document store|
|Current release||SQL Server 2019, November 2019|
|License Commercial or Open Source||commercial||commercial restricted free version is available||Open Source Apache Version 2.0|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Implementation language||C++||Java, Scala|
|Server operating systems||Linux|
|Typing predefined data types such as float or date||yes||yes||yes: int, bigint, decimal, string|
|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||no|
|Secondary indexes||yes||yes||all fields are automatically indexed|
|SQL Support of SQL||yes||yes||SQL-like query language|
|APIs and other access methods||.Net|
Tabular Data Stream (TDS)
|Supported programming languages||Java|
|Server-side scripts Stored procedures||user defined functions||Transact SQL, .NET languages, R, Python and (with SQL Server 2019) Java||no|
|Partitioning methods Methods for storing different data on different nodes||Sharding||tables can be distributed across several files (horizontal partitioning); sharding through federation||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||yes, but depending on the SQL-Server Edition|
|MapReduce Offers an API for user-defined Map/Reduce methods||yes Hadoop integration||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Eventual Consistency|
|Foreign keys Referential integrity||yes||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||no|
|Concurrency Support for concurrent manipulation of data||yes||yes||yes|
|Durability Support for making data persistent||yes||yes||Using Apache Lucene|
|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 for users, groups and roles according to SQL-standard||fine grained access rights according to SQL-standard|
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|EXASOL||Microsoft SQL Server||NSDb|
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