create table student_details(
  roll int,
  marks int,
  phone int,
  primary key(roll));
  
  insert into student_details values(2,50,12345);
  insert into student_details values(3,60,67894);
  insert into student_details values(4,70,12345);
  
  create or replace procedure pr1
    as
    begin
    update student_details
    set marks=marks+(marks*0.05);
    end;
    
    begin
    execute pr1;
    end;
    select * from student_details;