How to delete orphan database in SharePoint 2013

Hi,

I  have come across the database is corrupted. tried to delete the database using SQL management studio and tried to restore  from backup and attach the database . still no luck. 

How do i delete the database, Tried below link no luck. 

http://rajinihasan.blogspot.in/2013/02/deleting-orphan-databases-sharepoint.html

YOGESHA H P(MCTS)