sql - query to segregate users based on role per project in mysql -

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I have a table that includes Project IDs, User IDs and RollIds with other columns.

I am trying to get a query that will give users to each project based on the role.

I tried and if the case statement but it was able to know.

table: 

  projectid | User ID Role | Flag 1000001 | 20001 | 1 | Y 1000001 | 20002 2 | Y 1000001 | 20003 | 2 | Y 1000001 | 20004 | 3 | Y 1000001 | 20005 1 | Y 1000002. 20006. 3 | Y   
 role 1 = junior, 2 = tl, 3 = consider the hyde, I'm trying to find something like this  
  projectid | Junior | TL | HOD 1000001 | 20001, 20005. 20002, 20003. 20004 1000002 | ------------- | ------------- | 20006    
 
 
 You need to use  
  Select projectid, group_concat (case when roleid = 1 userid end) junior, group_concat (case when roleid = 2 userid end) senior, group_concat (case when roleid = 3 userid end) by projectid by TL table1 group

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