I have more than 80 Projects which needs to be define in Primavera P6 Release 8..2
Is there any way that I can mass upload them in to the system, if yes is there any temeplate or mapping fields detail or something which can be used?
Use P6 client to upload project in excel file to the database. You will be able to configure it based on your need. You may want to first export an existing project from P6 and setup the template for export. Use this excel template to import any subsequent projects.
You can not upload new data from excel (unless you have the P6 SDK) installed. You can only modify data. You will need to first create the projects/activities in P6 then export them into excel. Then you can update them with the correct info and import back to P6.
Installing the SDK will allow you to inject new data into the P6 database and would help a ton.