1. 玛丽亚数据库：
MariaDB 是一个开源关系数据库管理系统 (RDBMS)，是广泛使用的 MySQL 数据库技术的兼容替代品。它由 MariaDB Foundation 开发并于 2009 年 10 月 29 日首次发布。MariaDB 具有大量新功能，这使其在性能和用户导向方面优于 MySQL。
2. PostgreSQL :
PostgreSQL 是一个强大的开源对象关系数据库系统。由于其高稳定性，它以低维护工作提供良好的性能。 PostgreSQL 是第一个实现多版本并发控制 (MVCC) 功能的 DBMS。
MariaDB 和 PostgreSQL 的区别：
| S.NO. | MARIADB | POSTGRESQL |
|---|---|---|
| 1. | Developed by MariaDB Corporation Ab and MariaDB Foundation on 2009. | Developed By PostgreSQL Global Development Group on 1989. |
| 2. | It is a MySQL application compatible open source RDBMS, enhanced with high availability, security, interoperability and performance capabilities. | It is widely used open source RDBMS. |
| 3. | MariaDB is written in C and C++ languages. | PostgreSQL is written in C languages. |
| 4. | The primary database model for MariaDB is Relational DBMS. | Also the primary database model for PostgreSQL is Relational DBMS. |
| 5. | It has two Secondary database models – Document store and Graph DBMS. | It has Document store as Secondary database models. |
| 6. | Server operating systems for MariaDB are FreeBSD, Linux, Solaris and Windows. | Server operating systems for PostgreSQL are FreeBSD, HP-UX, Linux, NetBSD, OpenBSD, OS X, Solaris, Unix and Windows. |
| 7. | It supports Server-side scripting. | It has user defined functions for Server-side scripts |
| 8. | Supported Partitioning method are – Horizontal partitioning, sharding with Spider storage engine and Galera cluster. | In PostgreSQL, partitioning can be done by range, list and hash. |
| 9. | It support two replication methods – Master-master replication and Master-slave replication. | It support only one replication methods – Master-master replication |
| 10. | It supports in-memory capabilities. | It does not supports in-memory capabilities. |