trigger一点儿小发现new or :new、ORA-04091
If you delete the line “FOR EACH ROW” from the trigger, it becomes a statement trigger which is not subject to this restriction, and the trigger.
Backups to tape can only be backup sets. use rman
By default, RMAN creates all backups as backup sets, on tape or on disk. You can change the default backup type for disk backups to be image copies using the CONFIGURE command. Backups to tape can only be backup sets.
oracle同一实例不同用户之间所有对象的数据导入
同一实例下，不同用户之间的数据同步导入
1，exp from a user,imp to b user,
2,impdp network_link,不生成dump文件直接导入
…
HWM 高水位储存位置
Extent Header:: spare1: 0 spare2: 0 #extents: 4 #blocks: 32
last map 0x00000000 #maps: 0 offset: 2716
Highwater:: 0x02400391 ext#: 3 blk#: 8 ext size: 8
Loss database default tablespace files affected and recovery
接上一篇，
如果丢失数据库默认表空间的任一数据文件，数据库会不会shutdown?
Any loss of controlfile effects of database and recovery the controlfile
Your database is having two control files, three redo log file groups with two members in each group. Failure of which file would cause an instance to shut down
loss of all controlfile,database is automatic shutdown abort?(丢失所有控制文件，数据库会关闭？)
Your database is configured in NOARCHIVELOG mode. All the control files have been lost due to a hard disk failure but the data files are not lost. You have the closed whole database backup available to you…
expdp with sys or Include Multiple tables like
UDE-00008: operation generated ORACLE error 28009
ORA-28009: connection as SYS should be as SYSDBA or SYSOPER
flashback DDL not affect
flashback query 可以闪回以前的数据行，但不可以闪回alter table修改前的表结构,这点在11G推出的闪回表空间是一样的…
1z0-042两个错误答案225，180
One of the database users accidentally deleted all the rows of a critical table and committed the delete at 1:30 p.m. …
1z0-042 259题实验
Identify the two tablespaces whose data files are so critical that only a closed recovery is possible. (Choose two.)
windows配置oerr 查询oracle错误
在linux 上很容易查询 oracle的错误编码，得到提示、原因、及大概解决思路，但windows操作系统就没有办法应用oerr查询错误了，但是有群国外的哥们实现了在windows上使用oerr的方法
oracle10G 深入dual伪表(原)
今天群里谈DUAL,网上找了点说明，DUAL表就像ORACLE的宝贝女儿，一直隐藏而众多人士又想了解靠近，我决定试一下，发现10G的dual表比9i有变动，也更加合理，话不多说，老风格动手吧
sql 判断字段值是是否包含中文字符
从表里提取汉字, 需要考虑字符集, 不同的字符集汉字的编码有所不同
这里以GB2312为例, 写一函数准确地从表里提取简体汉字.
在itpub上看到了这个方法，我修改了一下，修改后如下
sqlplus 限制用户delete(product_user_profile) sp2-0544
SQL> delete test where id=1;
SP2-0544: Command “delete” disabled in Product User Profile
sqlplus login Error accessing PRODUCT_USER_PROFILE
SQL> conn zwz/zwz;
Error accessing PRODUCT_USER_PROFILE
Warning: Product user profile information not loaded!
You may need to run PUPBLD.SQL as SYSTEM
