title: Joining two datasets to create a single tablix in report builder 3
body: <p>I am attempting to join two datasets in to one tablix for a report.  The second dataset requires a personID from the first dataset as its parameter.</p>
  
  <p>If i preview this report only the first dataset is shown. but for my final result what i would like to happen is for each row of a student there is a rowgrouping (?) of that one students modules with their month to month attendance. Can this be done in report builder?
   <img src="https://i.stack.imgur.com/50nVR.jpg" alt="image of two datasets i would like to join"></p>