Both MySQL and SQL Server, both are relational database management systems or RDBMS. MySQL is open source and is free to use whereas SQL Server is licensed product of Microsoft.
Following are the important differences between MySQL and SQL Server.
| Sr. No. | Key | MySQL | SQL Server |
|---|---|---|---|
| 1 | Owned/Developed By | MySQL is owned by Oracle. | SQL Server is developed by Microsoft. |
| 2 | Language support | MySql supports programming languages like C++, Java and has running support for Perl, TCL and Haskel. | SQL Server supports programming languages like C++, Java, Ruby, Visual Basic, Delphi, R. |
| 3 | Storage Space | MySql needs less amount of operational storage space. | SQL Server needs large amount of operational storage space. |
| 4 | Query Cancellation | MySql does not support midway query execution cancellation. | SQL Server allows canceling query execution midways. |
| 5 | Back Up | MySQL blocks the database while taking the backup. | SQL Server does not block the database during backup process. |
| 6 | Cost | MySQL is free to use. | SQL Server is costly. |
| 7 | Data File Manipulation | Data file can be manipulated while running. | Data file manipulation is not allowed under security consideration while running. |
| 8 | Available Editions | MySQL Standard Edition, MySQL Enterprise Edition, and MySQL Cluster Grade Edition. | Enterprise, Standard, Web, Workgroup, or Express. |