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ORACLE update 操作内部原理(2)
发表于：2013-10-11来源：IT博客大学习作者：惜分飞点击数：
标签：oracle
SQL commit; Commit complete. SQL alter system checkpoint; System altered. SQL alter system dump datafile 4 block 175; System altered. SQL select dump(XIFENFEI,16) from dual; DUMP(XIFENFEI,16) --------
SQL> commit;
Commit complete.
SQL> alter system checkpoint;
System altered.
SQL> alter system dump datafile 4 block 175;
System altered.
SQL> select dump('XIFENFEI','16') from dual;
DUMP('XIFENFEI','16')
-------------------------------------
Typ=96 Len=8: 58,49,46,45,4e,46,45,49
我们可以但看到值有XFF改变为XIFENFEI,存储长度变大
原文转自：http://blogread.cn/it/article/5666
