if i have a 7 fields .2 fields regarding to A object and 3 fields regarding to B object and 4 fields regarding to c object.but i want to display all filelds in one table.how can i diplay
How are these objects realted and what do you want your table to look like? It may be possible to achieve this using a standard controller and some creative VIsualforce, although it's most likely you'll need a Controller Extension or a Custom Controller. It depends on your requirements.
You will have to use a custom controller or if you are using standard controller then controller extension.