I will install microsoft ms sql server on ubuntu red hat linux

The MSSQL Server Prices are available here https://www.microsoft.com/en-us/sql-server/sql-server-2017-pricing

SQL Server 2017, which will be the first version to run on Windows, Linux and in Docker containers

SQL Server is Microsoft's relational database management system (RDBMS). It is a full-featured database primarily designed to compete against competitors Oracle Database (DB) and MySQL. Like all major RBDMS, SQL Server supports ANSI SQL, the standard SQL language.

Microsoft SQL Server Express is a version of Microsoft's SQL Server relational database management system that is free to download, distribute and use. It comprises a database specifically targeted for embedded and smaller-scale applications.

SQL Server 2016 Developer Edition is Free. In conjunction with the release of SQL Server 2016, Microsoft has announced that the Developer Edition of SQL Server will be free. In order to take advantage of this offer, you will need to be a member of Microsoft's Visual Studio Dev Essentials program

MySQL is one of several database systems, or RDMS (Relational Database Management System). MySQL is one of several RDMS's, others of which are Oracle, Informix, Postgres, and MSQL Basically, the difference between SQL and MySQL is the same as the difference between the Spanish and Mexicans.