Oracle表审核的添加日期和修改日期 [英] Added date and modified date for Oracle table audit

问题描述

根据要求，我需要为每个表支持两个必填列:ADDED_DATE，MODIFIED_DATE.
这些旨在用于DBA/审计目的.

According to requirenments I need to support two mandatory columns for each table: ADDED_DATE, MODIFIED_DATE.
These are intended for DBA/auditing purposes.

当我从应用程序内部插入/更新记录时，是否有可能使这些东西完全自动化，并由DB本身隐式支持?

Is it possible to make this stuff totally automatic, implicitly supported by DB itself when I'm inserting / updating records from within application?

推荐答案

在表上创建触发器(在更新每一行之前).

create a trigger on the table (before update for each row).

SQL> create table foo (hi varchar2(10), added_date date, modified_date date);

Table created.

SQL> create trigger foo_auifer
  2  before update or insert on foo
  3  for each row
  4  declare
  5  begin
  6    if (inserting) then
  7      :new.added_date := sysdate;
  8    elsif (updating) then
  9      :new.modified_date := sysdate;
 10    end if;
 11  end;
 12  /

Trigger created.

SQL> insert into foo (hi) values ('TEST');

1 row created.

SQL> insert into foo (hi) values ('TEST2');

1 row created.

SQL> update foo set hi = 'MODDED' where rownum  = 1;

1 row updated.

SQL> alter session set nls_date_format='dd-mon-yyyy hh24:mi:ss';

Session altered.

SQL> select * from foo;

HI         ADDED_DATE           MODIFIED_DATE
---------- -------------------- --------------------
MODDED     07-nov-2012 15:28:28 07-nov-2012 15:28:39
TEST2      07-nov-2012 15:28:30

SQL>

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