Amazon Aurora is available to customers through Amazon RDS. Amazon RDS is a distributed relational database service by Amazon Web Services (AWS). Designed to simplify the setup, operation, and scaling of a relational database for use in applications.

At the time of writing, c-treeACE supports the following platforms:
Windows (Desktop and Server), Linux (Red Hat, SUSE, Ubunto, Debian, etc), Oracle Solaris, IBM AIX, HP-UX, Mac OS X, QNX, FreeBSD, NetBSD, SCO OpenServer.

In addition to being a full-featured relational DBMS, CUBRID also supports collection types. The architectural solution adopted by CUBRID has a multi-process approach. CUBRID consists of several subsystems (Server Subsystem, Client Subsystem, and a Broker Subsystem), each of which runs in its own process.

Datacom is now owned by CA Technologies which renamed it from Datacom/DB to CA-Datacom/DB and later to CA Datacom/DB. CA Datacom/DB is designed to be scalable to manage extremely high-volume workloads.

DB2 Advanced Enterprise Server Edition provides data warehousing, transactional and analytics capabilities in one package. It also provides advanced features for storage optimization, in-memory computing, reliable system availability, and workload management tools.

Drizzle is targeted at the web-infrastructure and cloud computing markets.

Firebird was initially forked from Borland’s open source edition of InterBase in 2000, but since Firebird 1.5 the code has been largely rewritten.

Greenplum Database was developed by Greenplum, which was acquired by EMC Corporation in 2010. Greenplum Database is now owned by Pivotal Software.

The Hive software facilitates reading, writing, and managing large datasets residing in distributed storage using SQL. Structure can be projected onto data already in storage. A command line tool and JDBC driver are provided to connect users to Hive.

Initially developed at Facebook, Hive is now used and developed by other companies such as Netflix and the Financial Industry Regulatory Authority (FINRA). Amazon maintains a software fork of Hive that is included in Amazon Elastic MapReduce on Amazon Web Services.

With Impala, you can query data, whether stored in HDFS or Apache HBase – including SELECT, JOIN, and aggregate functions – in real time. Impala uses the same metadata, SQL syntax (Hive SQL), ODBC driver, and user interface (Hue Beeswax) as Apache Hive.

InfiniDB’s column-store architecture enables very quick load and query times.

InfiniDB was initially developed by InfiniDB (the company), which went out of business in 2014. In 2013, the company announced that InfiniDB was to be licensed under the General Public License v. 2. In 2016, MariaDB Corporation announced the release of its first big data analytics engine, MariaDB ColumnStore, which is based both on a fork of InfiniDB and open-source community contributions.

Products built with ITTIA DB SQL are fast and scalable, and run on modern operating systems such as Windows, Linux, INTEGRITY, QNX, ThreadX, Nucleus, μcOS-II, μcOS-III, and VxWorks – even with a custom file system and without an operating system.

Used as a central repository to store time-series data within an enterprise, kdb+ supports real-time analysis of billions of records and fast access to terabytes of historical data. The columnar design allows for greater speed and efficiency than typical relational databases. kdb+ is developed by Kx.

The Kognitio Analytical Platform is a scale-out in-memory, massively parallel processing (MPP), not-only-SQL, software technology that is optimized for low-latency large volume data load and high-throughput complex analytical workloads. The platform delivers ultra-fast high-concurrency SQL for Hadoop platforms and for existing data warehouse implementations.

It’s not clear whether LucidDB is still being developed or not. Its webpage (at Sourceforge) hasn’t had an update since 2010.

Using memory, MemSQL concurrently reads and writes data on a distributed system, enabling access to billions of records in seconds. MemSQL also includes a disk-based column store.

Microsoft Access provides a quick and easy way to develop databases and is particularly well suited for individuals and small business. Access is the most popular desktop database on the market.

Unlike similar cloud database services, SQL Database allows users to make relational queries against stored data, which can either be structured or semi-structured, or even unstructured documents.

MonetDB has been applied in high-performance applications for online analytical processing (OLAP), data mining, GIS, RDF, text retrieval and sequence alignment processing.

MySQL is currently owned by Oracle Corporation. It was originally owned and sponsored by MySQL AB – a Swedish, single for-profit firm. Sun Microsystems bought MySQL AB in 2008. Oracle Corporation then bought Sun Microsystems in 2010.

Netezza was initially developed by a company called Netezza, who were acquired by IBM in 2010. IBM rebranded Netezza to PureData System for Analytics, but still advertises it as powered by Netezza technology.

IBM claims that Netezza helps simplify and optimize performance of data services for analytic applications, and runs complex algorithms in minutes instead of hours.

NuoDB has a distributed object architecture that works in the cloud, which means that when a new server is added in order to scale-up the database, the database runs faster. The database distributes tasks amongst several processors to avoid bottlenecks of data. It also uses peer-to-peer messaging to route tasks to nodes.

ParAccel, the company, was acquired by Actian in 2013.

Postgres-XL has built-in MPP (Massively Parallel Processing) capability, with intelligent query planning, allowing you to use the familiar SQL language for handling queries over large data sets.

Postgres-XL allows you to either partition tables across multiple nodes, or replicate them. Partitioning (or distributing) tables allows for write scalability across multiple nodes as well as massively parallel processing (MPP) for Big Data type of workloads.

PostgreSQL runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows. It is fully ACID compliant, has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages).

PostgreSQL is free and open-source software, released under the terms of the PostgreSQL License, a permissive free-software license.

Presto was created by Facebook for the analytics needs of data-driven organisations.

PSQL is also optimised for software as a service (SaaS) deployment due to a file-based architecture enabling partitioning of data for multi-tenancy needs. Applications can store the data and the relationships in tables in a relational model (RDBMS) or store the data in a schema-less way with no fixed data model (key-value store).

Pervasive Software was acquired by Actian in 2013 and it is now branded as Actian PSQL.

R:BASE was the first relational database program for the PC. Created by Wayne Erickson in 1981, on November 13, 1981, Erickson and his brother, Ron Erickson, incorporated the company, MicroRim, Inc. to sell the database, MicroRIM.

RainStor was acquired by Teradata in 2014.

Realm is said to be up to 10x faster than raw SQLite for normal operations.

ASE is predominantly used on the Unix platform, but is also available for Microsoft Windows.

Produced by Sybase Inc., now an SAP company, its primary function is to analyze large amounts of data in a low-cost, highly available environment. SAP IQ is often credited with pioneering the commercialisation of column-store technology.

SAP claims that the SQL Anywhere solutions can provide secure, reliable data management and synchronization for thousands of mobile devices, Internet of Things (IoT) systems, and remote environments. SQL Anywhere was known as Sybase SQL Anywhere prior to the acquisition of Sybase by SAP.

Scalebase, the company, was founded in 2009. On August 18, 2015, ScaleArc announced the acquisition of Scalebase assets to augment its database load balancing solutions.

ScaleDB incorporates specific optimisations for time-series data that deliver an additional order-of-magnitude improvement on time-based queries and analytics.

ScaleDB uses the MySQL storage engine API (like InnoDB), then implements a two-tier clustered architecture. It scales-out in a linear fashion by simply adding nodes to the cluster, offering massive write and query performance in a highly fault-tolerant, cost-effective implementation.

SQLite is likely the most widely deployed database engine in the world. According to the SQLite website, it is deployed in:

• Every Android device
• Every iPhone and iOS device
• Every Mac
• Every Windows10 machine
• Every Firefox, Chrome, and Safari web browser
• Every instance of Skype
• Every instance of iTunes
• Every Dropbox client
• Every TurboTax and QuickBooks
• PHP and Python
• Most television sets and set-top cable boxes
• Most automotive multimedia systems
• Countless millions of other applications

The Aster Platform was initially developed by Aster Data, who was acquired by Teradata (Teradata had previously purchased an 11 percent stake in the Aster Data in 2010) in 2011.

TimesTen runs on most major Unix/Linux platforms and on various Windows platforms, in both 32-bit and 64-bit modes.

TimesTen was first developed by Hewlett-Packard, and is now owned by Oracle.

okuDB is included in Percona Server and MariaDB.

Trafodion builds on the scalability, elasticity, and flexibility of Hadoop. It extends Hadoop to provide guaranteed transactional integrity, enabling new kinds of big data applications to run on Hadoop.

The Hewlett Packard website claims that HPE Vertica provides blazing-fast speed (queries run 50-1,000x faster), petabyte-scale (store 10-30x more data per server), and openness and simplicity (use any BI/ETL tools, Hadoop, etc.) – all at 30% of the cost of traditional data warehouse solutions.

The open source edition of Virtuoso Universal Server is also known as OpenLink Virtuoso.

VistaDB consists of a redistributable database engine, Visual Studio integration, tools for data management, documentation, sample code and our fanatical technical support. In addition, VistaDB works with various ORMs and other third party tools.

Use VistaDB for the “lite” version of your application in which size and easy of deployment are paramount. And when greater scalability is required, upscale to SQL Server with no code changes.

Gibraltar also claims that VistaDB works with Anything built on ADO.NET

The WebScaleSQL RDBMS is an open-source system created as a software branch of the production-ready Community release of MySQL.

The source code of WebScaleSQL is hosted on GitHub and licensed under the terms of version 2 of the GNU General Public License.