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2. List of column-oriented DBMSes - Wikipedia

   en.wikipedia.org/wiki/List_of_column-oriented_DBMSes

   Open-source (since 2004) columnar Relational DBMS pioneer PostgreSQL cstore fdw, [1] vops [2] C cstore_fdw uses ORC format StarRocks Java & C++ Open source, unified analytics platform for batch and real-time analytics. Supports and extensions available from CelerData. VictoriaMetrics Go Time series database

3. Category:Free database management systems - Wikipedia

   en.wikipedia.org/wiki/Category:Free_database...

   Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Help; Learn to edit; Community portal; Recent changes; Upload file

4. List of relational database management systems - Wikipedia

   en.wikipedia.org/wiki/List_of_relational...

   List of Relational Database Management Systems (Alphabetical Order) Name License 4th Dimension: Proprietary Access Database Engine (formerly known as Jet Database Engine) ...

5. Database model - Wikipedia

   en.wikipedia.org/wiki/Database_model

   Database model for MediaWiki 1.28.0 (2017) Different types of database models A database model is a type of data model that determines the logical structure of a database.It fundamentally determines in which manner data can be stored, organized and manipulated.

6. Object–relational database - Wikipedia

   en.wikipedia.org/wiki/Object–relational_database

   An object–relational database (ORD), or object–relational database management system (ORDBMS), is a database management system (DBMS) similar to a relational database, but with an object-oriented database model: objects, classes and inheritance are directly supported in database schemas and in the query language.

7. Relational database - Wikipedia

   en.wikipedia.org/wiki/Relational_database

   A Relational Database Management System (RDBMS) is a type of database management system that stores data in a structured format using rows and columns. Many relational database systems are equipped with the option of using SQL (Structured Query Language) for querying and updating the database. [3]

8. Multiple choice - Wikipedia

   en.wikipedia.org/wiki/Multiple_choice

   A multiple choice question, with days of the week as potential answers. Multiple choice (MC), [1] objective response or MCQ(for multiple choice question) is a form of an objective assessment in which respondents are asked to select only the correct answer from the choices offered as a list.

9. Database schema - Wikipedia

   en.wikipedia.org/wiki/Database_schema

   The database schema is the structure of a database described in a formal language supported typically by a relational database management system (RDBMS). The term "schema" refers to the organization of data as a blueprint of how the database is constructed (divided into database tables in the case of relational databases).