Shashi You should be able to build reports using multiple subject areas, that would enable you to use dimensions from multiple subject areas Kumar

Kelly This is really limited by data, which is columns x rows. More the columns lesser the rows you can get, lesser the columns more rows you can get. To answer your questions it varies and there is no known number limit that is published as such. Kumar

Shashi You should be able to build reports using multiple subject areas, that would enable you to use dimensions from multiple subject areas Kumar