I would like to monitor Oracle and MSSQL in my environment using Zabbix

[Sowmiya]

Need help with the best way to monitor Oracle and MSSQL databases using Zabbix. Please also provide documentation with the installation steps.

[AvaTTaR]

Hi, you need to use ODBC-monitoring(https://www.zabbix.com/documentation.../odbc_checks):
At first you must configure unixODBC -http://www.unixodbc.org/
configure unixODBC connectors to Oracle and MSSQL
next configure unixODBC to connect to your databases(all you need at first link)
and after you will be able to make SQL selects to your databases by zabbix ODBC check.