SQL 是结构化查询语言的首字母缩写词。它用于访问、操作和检索数据库中的信息。
MySQL 是一种基于结构化查询语言 (SQL) 的开源关系数据库管理系统 (RDBMS)。它在 Linux、UNIX 和 Windows 等平台上运行。
SQL Server 由 Microsoft Corporation 拥有和开发。 SQL Server 的主要函数是存储和访问其他应用程序所需的数据，无论它们是在连接到网络的其他计算机上运行，还是在存储服务器的计算机上运行。
| MS SQL Server | MySQL |
|---|---|
| Developed by Microsoft. | Developed by Oracle. |
| It supports programming languages like C++, JAVA, Ruby, Visual Basic, Delphi, R etc. | MySQL offers extended running support for languages like Perl, Tcl, Haskey etc. |
| Expects a large amount of operational storage space. | Expects less amount of operational storage space. |
| It enables for stopping query execution. | It doesn’t allow query cancellation mid-way in the process. |
| Doesn’t block the database while backing up the data. | Blocks the database while backing up the data. |
| It is not free. | It is open source. It is freely available. |
| It is a highly secured and doesn’t allow any kind of database file manipulation while running. | It allows database file manipulation while running. |
| It is available in multiple editions, such as Enterprise, Standard, Web, Workgroup, or Express. | It is available in MySQL Standard Edition, MySQL Enterprise Edition, and MySQL Cluster Grade Edition. |