Ok. You spend lots of money and spend years studying to gain some degree of expertise in MS SQL server. However, SQL server's competitions are still alive and well in the job market. Oracle, DB2, Sybase, MySQL and even MS Access. If you get booted your current job where you use SQL server, it can be difficult to find another company that is looking for SQL server skill because that another company could be using Oralce, and in my opinion, it's too much for an average person to gain enough expertise in SQL server and Oracle in one life time.
Anything you can share on this concern?