Datawarehousing

Hi folks, i want to know about datawarehousing, how is it, whats the scope it has, how many companies worked with it(plz get some names)how much the package got in INDIA, i m MCA from bhopal(not a good college). as per the current condition, will i get a job in MNC of i have to do some course, i thought about Datawarehousing and mainframes…..the people who knows something please reply to help me…also please let me know the names of institutes in PUNE and HYDERABAD where i can get admission in these courses.
Thanks in Advance….
Naman jain
+91 9766045972