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2. PostgreSQL - Wikipedia

   en.wikipedia.org/wiki/PostgreSQL

   PostgreSQL (/ ˌ p oʊ s t ɡ r ɛ s k j u ˈ ɛ l / POHST-gres-kew-EL) [11] [12] also known as Postgres, is a free and open-source relational database management system (RDBMS) emphasizing extensibility and SQL compliance.

3. VoltDB - Wikipedia

   en.wikipedia.org/wiki/VoltDB

   VoltDB is a NewSQL OLTP [3] relational database that supports SQL access from within pre-compiled Java stored procedures.. While direct SQL access is supported, [4] the most efficient form of interaction is using stored procedure calls, [5] as it involves fewer network trips.

4. SQL - Wikipedia

   en.wikipedia.org/wiki/SQL

   SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] This version, initially called SEQUEL (Structured English Query Language), was designed to manipulate and retrieve data stored in IBM's original quasirelational database management system, System R, which a group at IBM San ...

5. IBM Db2 - Wikipedia

   en.wikipedia.org/wiki/IBM_Db2

   IBM Db2 Community Edition is a free-to-download, free-to-use edition of the IBM Db2 database, which has both XML database and relational database management system features. Version 11.5 provides all core capabilities of Db2 but is limited to 4 virtual processor cores, 16 GB of instance memory, has no enterprise-level support, and no fix packs ...

6. Dapper ORM - Wikipedia

   en.wikipedia.org/wiki/Dapper_ORM

   Dapper is an object–relational mapping (ORM) product for the Microsoft .NET platform. It provides a framework for mapping an object-oriented domain model to a traditional relational database. [4] Its purpose is to relieve the developer from a significant portion of relational data persistence-related programming tasks.

7. Relational database - Wikipedia

   en.wikipedia.org/wiki/Relational_database

   A database management system used to maintain relational databases is a relational database management system (RDBMS). Many relational database systems are equipped with the option of using SQL (Structured Query Language) for querying and updating the database.

8. Relation (database) - Wikipedia

   en.wikipedia.org/wiki/Relation_(database)

   [5] [6] A relational database definition (database schema, sometimes referred to as a relational schema) can thus be thought of as a collection of named relation schemas. [7] [8] In implementations, the domain of each attribute is effectively a data type [9] and a named relation schema is effectively a relation variable (relvar for short).

9. MonetDB - Wikipedia

   en.wikipedia.org/wiki/MonetDB

   MonetDB is an open-source column-oriented relational database management system (RDBMS) originally developed at the Centrum Wiskunde & Informatica (CWI) in the Netherlands.It is designed to provide high performance on complex queries against large databases, such as combining tables with hundreds of columns and millions of rows.