DBMS > H2 vs. HyperSQL vs. Immudb
System Properties Comparison H2 vs. HyperSQL vs. Immudb
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|Editorial information provided by DB-Engines|
|Name||H2 Xexclude from comparison||HyperSQL also known as HSQLDB Xexclude from comparison||Immudb Xexclude from comparison|
|Description||Full-featured RDBMS with a small footprint, either embedded into a Java application or used as a database server.||Multithreaded, transactional RDBMS written in Java also known as HSQLDB||An open source immutable (append-only) database with cryptographic verification which makes it tamper-resistant and fully auditable.|
|Primary database model||Relational DBMS||Relational DBMS||Key-value store|
|Secondary database models||Spatial DBMS||Relational DBMS|
|Current release||2.1.214, June 2022||2.7.1, October 2022||1.2.3, April 2022|
|License Commercial or Open Source||Open Source dual-licence (Mozilla public license, Eclipse public license)||Open Source based on BSD license||Open Source Apache Version 2.0|
|Cloud-based only Only available as a cloud service||no||no||no|
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|Server operating systems||All OS with a Java VM||All OS with a Java VM Embedded (into Java applications) and Client-Server operating modes||BSD|
|Typing predefined data types such as float or date||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.||no||no||no|
|SQL Support of SQL||yes||yes||SQL-like syntax|
|APIs and other access methods||JDBC|
|HTTP API JDBC via HTTP|
PostgreSQL wire protocol
|Supported programming languages||Java||All languages supporting JDBC/ODBC|
|Server-side scripts Stored procedures||Java Stored Procedures and User-Defined Functions||Java, SQL||no|
|Partitioning methods Methods for storing different data on different nodes||none||none||Sharding|
|Replication methods Methods for redundantly storing data on multiple nodes||With clustering: 2 database servers on different computers operate on identical copies of a database||none|
|MapReduce Offers an API for user-defined Map/Reduce methods||no||no||no|
|Consistency concepts Methods to ensure consistency in a distributed system||Immediate Consistency||Immediate Consistency||Immediate Consistency|
|Foreign keys Referential integrity||yes||yes||no|
|Transaction concepts Support to ensure data integrity after non-atomic manipulations of data||ACID||ACID||ACID|
|Concurrency Support for concurrent manipulation of data||yes, multi-version concurrency control (MVCC)||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||no|
|User concepts Access control||fine grained access rights according to SQL-standard||fine grained access rights according to SQL-standard|
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|H2||HyperSQL also known as HSQLDB||Immudb|
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