plsql打印出99乘法表

declare
       x int;
       y int;
begin
     x:=1;
    
     while x<=9 loop
       y:=1;
       while y<=x loop
             dbms_output.put(y || '*' || x || '=' || x*y || '  ');
             y:=y+1;
       end loop;
       dbms_output.put_line('');
       x:=x+1;
     end loop;
end;