实验如下：
--查询触发器要定义的hr用户下的表DEPARTMENTS
SQL> conn hr/hr;
Connected.
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
COUNTRIES TABLE
DEPARTMENTS TABLE
EMPLOYEES TABLE
EMP_DETAILS_VIEW VIEW
JOBS TABLE
JOB_HISTORY TABLE
LOCATIONS TABLE
REGIONS TABLE
8 rows selected.
--创建触发器：
SQL> CREATE OR REPLACE TRIGGER tr_dept_time
2 BEFORE INSERT OR DELETE OR UPDATE
3 ON departments
4 BEGIN
5 IF (TO_CHAR(sysdate,'DAY') IN ('星期六', '星期日')) OR (TO_CHAR(sysdate, 'HH24:MI') NOT BETWEEN '08:30' AND '18:00') THEN
6 RAISE_APPLICATION_ERROR(-20001, '不是上班时间，不能修改departments表');
7 END IF;
8 END;
9 /
Trigger created.
--查询触发器信息：
--触发器视图定义：
--查询触发器要定义的hr用户下的表DEPARTMENTS
SQL> conn hr/hr;
Connected.
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
COUNTRIES TABLE
DEPARTMENTS TABLE
EMPLOYEES TABLE
EMP_DETAILS_VIEW VIEW
JOBS TABLE
JOB_HISTORY TABLE
LOCATIONS TABLE
REGIONS TABLE
8 rows selected.
--创建触发器：
SQL> CREATE OR REPLACE TRIGGER tr_dept_time
2 BEFORE INSERT OR DELETE OR UPDATE
3 ON departments
4 BEGIN
5 IF (TO_CHAR(sysdate,'DAY') IN ('星期六', '星期日')) OR (TO_CHAR(sysdate, 'HH24:MI') NOT BETWEEN '08:30' AND '18:00') THEN
6 RAISE_APPLICATION_ERROR(-20001, '不是上班时间，不能修改departments表');
7 END IF;
8 END;
9 /
Trigger created.
--查询触发器信息：
--触发器视图定义：
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/31397003/viewspace-2147973/ ，如需转载，请注明出处，否则将追究法律责任。
请登录后发表评论
登录
全部评论
