Oracle中plsqlCase语句

set serveroutput on

declare

 v_score number;

 

begin 

  v_score:=99;

  case

  when v_score>=80 then dbms_output.put_line('优秀');

  when v_score>=60 then dbms_output.put_line('良好');

  else dbms_output.put_line('补好');

  end case;

end;