Hi Chennakesava,
The easiest way to find table name of anything would be open the record from the list . Says Suppose Incident so open incident list and open any Incident record you want then right click on header and select "show XML" . The first thing in that below xml tag would be the name of table.
In this way you will get information about other fields as well which is very useful.
Please Hit Correct or Mark Helpful if it solved your purpose.
