1. MariaDB：
MariaDB是一个开源关系数据库管理系统(RDBMS)，它是广泛使用的MySQL数据库技术的兼容即插即用替代品。它由MariaDB基金会开发，最初于2009年10月29日发布。MariaDB具有大量新功能，因此在性能和面向用户方面比MySQL更好。
2. MS SQL Server：
Microsoft SQL Server是一个依赖于平台的关系数据库管理系统(RDBMS)，它既是GUI也是基于命令的软件。它支持公司IT环境中的各种事务处理，商业智能和分析应用程序。它由Microsoft Corporation开发，最初于1989年4月24日发布。
MariaDB和MS SQL Server之间的区别：
| S.NO. | MARIADB | MS SQL SERVER |
|---|---|---|
| 1. | Developed by MariaDB Corporation Ab and MariaDB Foundation on 2009. | Developed by Microsoft Corporation and initially released on April 24, 1989. |
| 2. | MariaDB is written in C, C++, Perl and Bash languages. | MS SQL server is written in C and C++. |
| 3. | It is a MySQL application compatible open source RDBMS, enhanced with high availability, security, interoperability and performance capabilities. | It is a Microsofts relational DBMS. |
| 4. | The primary database model for MariaDB is Relational DBMS. | The primary database model for MS SQL Server is also Relational DBMS. |
| 5. | It has two Secondary database models – Document store and Graph DBMS. | It also has two Secondary database models – Document store and Graph DBMS. |
| 6. | The license for MariaDB is Open Source. | The license for MS SQL Server is Commercial. |
| 7. | Server operating systems for MariaDB are FreeBSD, Linux, Solaris and Windows. | Server operating systems for MS SQL Server are Linux and Windows. |
| 8. | It support two replication methods – Master-master replication and Master-slave replication. | It also support replication but in depends on the SQL-Server Edition. |
| 9. | Technical documentation : mariadb.com/kb/en/library | Technical documentation : docs.microsoft.com/en-ie/sql/sql-server/sql-server-technical-documentation |