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DBMS > H2 vs. OpenMLDB vs. SQL.JS

System Properties Comparison H2 vs. OpenMLDB vs. SQL.JS

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Editorial information provided by DB-Engines
NameH2  Xexclude from comparisonOpenMLDB  Xexclude from comparisonSQL.JS  Xexclude from comparison
DescriptionFull-featured RDBMS with a small footprint, either embedded into a Java application or used as a database server.An open-source machine learning database that provides a feature platform for training and inferencePort of SQLite to JavaScript
Primary database modelRelational DBMSTime Series DBMSRelational DBMS
Secondary database modelsSpatial DBMSRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score8.33
Rank#46  Overall
#30  Relational DBMS
Score0.10
Rank#359  Overall
#36  Time Series DBMS
Score0.63
Rank#241  Overall
#112  Relational DBMS
Websitewww.h2database.comopenmldb.aisql.js.org
Technical documentationwww.h2database.com/­html/­main.htmlopenmldb.ai/­docs/­zh/­mainsql.js.org/­documentation/­index.html
DeveloperThomas Mueller4 Paradigm Inc.Alon Zakai infoenhancements implemented by others
Initial release200520202012
Current release2.2.220, July 20232024-2 February 2024
License infoCommercial or Open SourceOpen Source infodual-licence (Mozilla public license, Eclipse public license)Open SourceOpen Source
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageJavaC++, Java, ScalaJavaScript
Server operating systemsAll OS with a Java VMLinuxserver-less, requires a JavaScript environment (browser, Node.js)
Data schemeyesFixed schemayes
Typing infopredefined data types such as float or dateyesyesyes
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.nonono
Secondary indexesyesyes
SQL infoSupport of SQLyesyesyes infoSQL-92 is not fully supported
APIs and other access methodsJDBC
ODBC
JDBC
SQLAlchemy
JavaScript API
Supported programming languagesJavaC++
Go
Java
Python
Scala
JavaScript
Server-side scripts infoStored proceduresJava Stored Procedures and User-Defined Functionsnono
Triggersyesnono
Partitioning methods infoMethods for storing different data on different nodesnonehorizontal partitioningnone
Replication methods infoMethods for redundantly storing data on multiple nodesWith clustering: 2 database servers on different computers operate on identical copies of a databaseSource-replica replicationnone
MapReduce infoOffers an API for user-defined Map/Reduce methodsnono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistencynone
Foreign keys infoReferential integrityyesnoyes
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDnoACID
Concurrency infoSupport for concurrent manipulation of datayes, multi-version concurrency control (MVCC)yes
Durability infoSupport for making data persistentyesyesno infoexcept by serializing a db to a file
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesyes
User concepts infoAccess controlfine grained access rights according to SQL-standardfine grained access rights according to SQL-standardno

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H2OpenMLDBSQL.JS
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