visit bellow link to know more information about SQL Server compared to MySQL
http://www.microsoft.com/sqlserver/2008/en/us/compare-mysql.aspx
visit bellow link to know more information about SQL Server compared to MySQL
http://www.microsoft.com/sqlserver/2008/en/us/compare-mysql.aspx
visit bellow link to know more information about SQL Server compared to IBM DB2
http://www.microsoft.com/sqlserver/2008/en/us/compare-ibm-db2.aspx
visit bellow link to know more information about SQL Server compared to Oracle
http://www.microsoft.com/sqlserver/2008/en/us/compare-oracle.aspx