How to Import Data from Aras Innovator V11.Sp12 to V12.0


I recently installed Aras Innovator V12.0. I was using Aras Innovator V11.Sp12 where all my work was done. Now, i would like to switch to V12.0, I have few tables around 9 tables in which two tables of Manufacturing Process Plan and Operations, the rest are customized item types. How can i import the data of some of the tables which i need from V11.Sp12 to V12.0.