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Difference between MySQL and SQL Server
Both MySQL and SQL Server are relational database management systems (RDBMS) that use SQL for querying and managing data. MySQL is open source and owned by Oracle, whereas SQL Server is a licensed commercial product developed by Microsoft.
MySQL
MySQL is an open-source RDBMS that is widely used in web applications. It is free to use under the GPL license, lightweight in storage requirements, and runs on multiple platforms including Linux, Windows, and macOS. MySQL is the database behind many popular platforms like WordPress, Facebook, and Twitter.
SQL Server
SQL Server (Microsoft SQL Server) is a commercial RDBMS developed by Microsoft. It offers advanced enterprise features like built-in business intelligence tools, non-blocking backups, and tight integration with the Microsoft ecosystem (.NET, Azure, Visual Studio). SQL Server primarily runs on Windows, though recent versions also support Linux.
Key Differences
| Feature | MySQL | SQL Server |
|---|---|---|
| Owned By | Oracle Corporation | Microsoft |
| Cost | Free (open source, GPL) | Commercial (paid license, free Express edition available) |
| Language Support | C++, Java, Perl, TCL, Haskell, PHP | C++, Java, Ruby, Visual Basic, Delphi, R, .NET |
| Storage Space | Requires less operational storage | Requires more operational storage |
| Query Cancellation | Does not support midway cancellation | Supports canceling queries midway |
| Backup Behavior | Blocks the database during backup | Non-blocking backup (database remains accessible) |
| Data File Manipulation | Allowed while server is running | Not allowed while running (security restriction) |
| Platform | Linux, Windows, macOS | Windows, Linux (recent versions) |
| Available Editions | Standard, Enterprise, Cluster Grade | Enterprise, Standard, Web, Workgroup, Express |
Conclusion
MySQL is a lightweight, free, cross-platform RDBMS ideal for web applications and startups. SQL Server is a feature-rich commercial RDBMS with enterprise tools, non-blocking backups, and deep Microsoft ecosystem integration, making it better suited for large-scale enterprise environments.
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