create [or replace] trigger 触发器名 触发时间 {before | after} -- view 中是 instead of 触发事件 { insert | update | delete} -- dml、ddl、database on 触发对象 -- table、view、schema、database 触发频率 { for each row} -- 行级触发器。默认:语句级触发器 [follows 其它触发器名] -- ...
ORACLE可以在DML语句进行触发,可以在DML操作前或操作后进行触发,并且可以对每个行或语句操作上进行触发。 1.2 替代触发器 由于在ORACLE里,不能直接对由两个以上的表建立的视图进行操作。所以给出了替代触发器。它就是ORACLE 8专门为进行视图操作的一种处理方法。 1.3 系统触发器 ORACLE 8i 提供了第三种类型的触发器...
Oracle Forms can define, store, and execute triggers of a different sort. However, do not confuse Oracle Forms triggers with the database triggers discussed in this chapter. Triggers vs. Declarative Integrity Constraints You can use both database triggers and integrity constraints to define and...
随着多宿主选项的引入,数据库事件触发器可以在CDB和PDB范围内创建。 1. 触发器范围 为了在CDB中创建数据库事件触发器,需要以通用用户登录到数据库,且该用户需要被授予ADMINISTER DATABASETRIGGER系统权限。 CONN sys@cdb1 AS SYSDBA CREATE OR REPLACE TRIGGER cdb1_aftr_strtup_trg AFTER STARTUP ON DATABASE BEG...
Oracle Database XE does not fire a trigger that is not committed. CREATE OR REPLACE TRIGGER my_trigger AFTER CREATE ON DATABASE BEGIN NULL; END; Privileges Needed to Work with Triggers To create a trigger in your schema, you must have the CREATE TRIGGER system privilege, and one of the...
ORA-02070: database does not support in this context ORA-06512: at line 15 出现ORA-02070错误,估计是类此sys_context(‘userenv’, ‘os_user’)导致。 4.第二次创建触发器 SQL> create or replace trigger tri_ddl_audit 2 before ddl on database ...
触发器是许多关系数据库系统都提供的一项技术。在ORACLE系统里,触发器类似过程和函数,都有声明,执行和异常处理过程的PL/SQL块。 8.1 触发器类型 触发器在数据库里以独立的对象存储,它与存储过程和函数不同的是,存储过程与函数需要用户显示调用才执行,而触发器是由一个事件来启动运行。即触发器是当某个事件发生时...
Oracle Database Exadata Cloud Machine - Version N/A and laterOracle Cloud Infrastructure - Database Service - Version N/A and laterInformation in this document applies to any platform. Symptoms A privilege such as update, delete, or insert on a table has been granted through a role. ...
Oracle Cloud Infrastructure - Database Service - Version N/A and later Information in this document applies to any platform. Symptoms Oracle Database Upgrade Failed with below Error :- Symptoms 1: Oracle Server ORA-04045: errors during recompilation/revalidation of SYSTEM.LOG_AND_BLOCK_DDL_TRIGGE...
2、单个用户:可通过trigger触发器限制/允许某IP或IP段访问; -->实验不可对整个DB层 (AFTER LOGON ON database)登陆提示告警.. 一、sqlnet.ora [oracle@10.240.1.7 admin]$ cat sqlnet.ora tcp.validnode_checking = yes #需要设置成yes,方可激活生效 ...