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DBMS > Postgres-XL vs. Snowflake vs. SQL.JS vs. VoltDB

System Properties Comparison Postgres-XL vs. Snowflake vs. SQL.JS vs. VoltDB

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Editorial information provided by DB-Engines
NamePostgres-XL  Xexclude from comparisonSnowflake  Xexclude from comparisonSQL.JS  Xexclude from comparisonVoltDB  Xexclude from comparison
DescriptionBased on PostgreSQL enhanced with MPP and write-scale-out cluster featuresCloud-based data warehousing service for structured and semi-structured dataPort of SQLite to JavaScriptDistributed In-Memory NewSQL RDBMS infoUsed for OLTP applications with a high frequency of relatively simple transactions, that can hold all their data in memory
Primary database modelRelational DBMSRelational DBMSRelational DBMSRelational DBMS
Secondary database modelsDocument store
Spatial DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.53
Rank#254  Overall
#117  Relational DBMS
Score130.36
Rank#8  Overall
#5  Relational DBMS
Score0.63
Rank#241  Overall
#112  Relational DBMS
Score1.47
Rank#157  Overall
#73  Relational DBMS
Websitewww.postgres-xl.orgwww.snowflake.comsql.js.orgwww.voltdb.com
Technical documentationwww.postgres-xl.org/­documentationdocs.snowflake.net/­manuals/­index.htmlsql.js.org/­documentation/­index.htmldocs.voltdb.com
DeveloperSnowflake Computing Inc.Alon Zakai infoenhancements implemented by othersVoltDB Inc.
Initial release2014 infosince 2012, originally named StormDB201420122010
Current release10 R1, October 201811.3, April 2022
License infoCommercial or Open SourceOpen Source infoMozilla public licensecommercialOpen SourceOpen Source infoAGPL for Community Edition, commercial license for Enterprise, AWS, and Pro Editions
Cloud-based only infoOnly available as a cloud servicenoyesnono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageCJavaScriptJava, C++
Server operating systemsLinux
macOS
hostedserver-less, requires a JavaScript environment (browser, Node.js)Linux
OS X infofor development
Data schemeyesyes infosupport of semi-structured data formats (JSON, XML, Avro)yesyes
Typing infopredefined data types such as float or dateyesyesyesyes
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.yes infoXML type, but no XML query functionalityyesno
Secondary indexesyesyes
SQL infoSupport of SQLyes infodistributed, parallel query executionyesyes infoSQL-92 is not fully supportedyes infoonly a subset of SQL 99
APIs and other access methodsADO.NET
JDBC
native C library
ODBC
streaming API for large objects
CLI Client
JDBC
ODBC
JavaScript APIJava API
JDBC
RESTful HTTP/JSON API
Supported programming languages.Net
C
C++
Delphi
Erlang
Java
JavaScript (Node.js)
Perl
PHP
Python
Tcl
JavaScript (Node.js)
Python
JavaScriptC#
C++
Erlang infonot officially supported
Go
Java
JavaScript infoNode.js
PHP
Python
Server-side scripts infoStored proceduresuser defined functionsuser defined functionsnoJava
Triggersyesno infosimilar concept for controling cloud resourcesnono
Partitioning methods infoMethods for storing different data on different nodeshorizontal partitioningyesnoneSharding
Replication methods infoMethods for redundantly storing data on multiple nodesyesnoneMulti-source replication
Source-replica replication
MapReduce infoOffers an API for user-defined Map/Reduce methodsnononono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistencynone
Foreign keys infoReferential integrityyesyesyesno infoFOREIGN KEY constraints are not supported
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACID infoMVCCACIDACIDACID infoTransactions are executed single-threaded within stored procedures
Concurrency infoSupport for concurrent manipulation of datayesyesyes infoData access is serialized by the server
Durability infoSupport for making data persistentyesyesno infoexcept by serializing a db to a fileyes infoSnapshots and command logging
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.nonoyes
User concepts infoAccess controlfine grained access rights according to SQL-standardUsers with fine-grained authorization concept, user roles and pluggable authenticationnoUsers and roles with access to stored procedures

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More resources
Postgres-XLSnowflakeSQL.JSVoltDB
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