ANBOB™

SQL> create table testblob(id int,comm blob);

Table created.

ERROR at line 1:
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
ORA-06512: at “WMSYS.WM_CONCAT_IMPL”, line 30

今天发现用dbms_errlog可以捕获错误日志，很给力，直接看实验
[oracle@orazhang ~]$ sqlplus anbob/anbob

Today I read foreign blog,I think I learned the true knowledge
One of most operations we are performing is “Deleting many rows from oracle big tables” ;

declare
maxrows number default 1000;
row_id_table dbms_sql.Urowid_Table;
currcount_table dbms_sql.number_Table;
cursor cur_t2 is….

sql server 的维护计划可以定期的备份与删除备份文件，下面只提供备份文件从OS角度的处理方法，如何压缩传ftp,及删除过期的压缩文件

2011年7月21日 5：22，是对于我及家人来说非常重要的时刻，因为我的女儿出生了…

附照片一张

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.

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.

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
…

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

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?

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

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…

UDE-00008: operation generated ORACLE error 28009
ORA-28009: connection as SYS should be as SYSDBA or SYSOPER

SQL> show parameter recy NAME TYPE VALUE ————– […]

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…

One of the database users accidentally deleted all the rows of a critical table and committed the delete at 1:30 p.m. …

Identify the two tablespaces whose data files are so critical that only a closed recovery is possible. (Choose two.)

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