title: Modify data entry in a column with IDENTITY property
body: <p>I need to create a table named "PROCESS", its primary key is composed of twocolumns (IdOffice, IdProcess), the problem is that I need the "IdProcess" contains the IDENTITY property and increase one by one but depending on the value of field "IdOffice" as follows:</p>
  
  <p>The "IdProcess" must be increased one by one if the "IdOffice" is the same, so I put a picture for more clearly:</p>
  
  <p><img src="https://i.stack.imgur.com/uIKeW.jpg" alt="enter link description here"></p>
  
  <p>how I do this?</p>
  
  <p>Thanks for your help.</p>