首先执行语句
set serveroutput on
然后可使用
dbms_output.put_line('123')
来输出
set serveroutput on
declare c integer :=0;
BEGIN
select count(*) into c from sys_file where guid='437698e7-dbc1-4e3f-922a-793bababe05e';
if c=0 then
dbms_output.put_line ('aaa');
else
dbms_output.put_line ('bbb');
end if;
END;