Maybe blocks is what you are after? 

You can check out tutorials like:

http://world.episerver.com/blogs/Joe-Bianco/Dates/2013/7/Building-EPiServer-Templates-with-MVC-Razor-Part-2-Block-Templates/

and also examples in alloy demo projects where there are a few blocks implemented.

Hi Daniel,

Thanks for your reply.

My requirement is that to create a table called CustomerExtraInformation in SQL server database and store the record into it and show everywhere need like customer details on commerce manager and FE.

Do you have an idea that how can manage data to store in the newly added table?

Thanks,

Rajesh

Two basic options I would say:

1. Use standard .NET Entity Framework and store data using that. I would store it in a separate database to leave the Episerver db intact.

2. Use Episerver DDS to store data. The advantage is that you don't need a separate database and less custom code. Works well as long as you don't have huge amounts of data (more than 10 000+ rows)