Two Db Table in One Crystal Report..

Question

  Dear Friends,

                         I am struck with the Crystal Report.I have requirement , I need to display the two db table into One Cystal Report.

  I have created Purchase Order.I done all stuffs with that.The Thing is I need to Display the Address of the Vendor, For that i would 

  have to get the Vendor detail from other table. How can achieve that ?..

 

  Help me out if possible to anyone ..

  Thanking You,