触发器语句如下：
create or replace trigger count_trigger
before insert or update or delete
on count

begin
insert into count_log(
who,when)
values(
user,sysdate);
end;
报错：
Compilation errors for TRIGGER TEST.COUNT_TRIGGER

Error: PLS-00103: Encountered the symbol WHEN when expecting one of the following

<an identifier> <a double-quoted delimited-identifier>
The symbol " <an identifier> was inserted before "WHEN" to continue.
Line: 7
Text: who,when)

我单独测试了一次insert into count_log(who,when) values(user,sysdate); 是可以实现的～ 有人可以指点一下报错原因么 ？

------解决方法--------------------------------------------------------
凡是有when之类的都需要使用动态sql

如

immediate execute sql;
------解决方法--------------------------------------------------------
将字段名加双引号试试
insert into count_log(
"who","when")
values(
user,sysdate);
------解决方法--------------------------------------------------------
字段名、变量名应该避免和保留字（reserved word）冲突。
when 是PLSql 的保留字，你的字段名也是 when，冲突了。