Record in Maintable with Only INSERT Command

I have 3 table.
UserTable(id,username)
Permission(pid,pertype)
MainTable(autoid,username,pertype)

Usertable and Permission table are having record.
I want to put that record in the Maintable with only INSERT command.
How I would do it?

Here is your answer:

  first get the records from the UserTable and Permission using
  ResultSet rs=......executeQuery("select * from UserTable");
  while(rs.next())
  {
   
  }

and 
   
  insert those things using
  PreparedStatement pr=con.PrepareStatement("insert into mainTable values(?,?,?)");
  pr.setString(1,variblename);
  pr.setString(2,variblename);
  pr.setString(3,variblename);
   
  pr.executeUpdate();
   
  }
      
finish

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