dbms_xplan
测试表:create table tb1 as select dba_objects;SQL>delete from plan_table;SQL>explain plan for select owner,object_type,count(*) from tb1 group by owner,object_type;SQL> select * from table( dbms_xpla...
datafile on nfs mount
Q:Per note 359515.1 nfs mounts are supported for datafiles with oracle 10. Does anyone know if the same applies for 9.2 databases? I urgently need to create a clone of a 9.2 environment, but suprise s...
备份文件的管理(rman,find,gzip etc.)
My Unix Rman scrīpt runs Rman that puts the backups in a certaindirectory. I use the find command to compress all files that have notalready been compressed. (find $BACKUP_DIR/* \! -name '*.gz'...
linux制作安装包的两种方法
制作安装包的两种方法:减法:在现有suse 母盘的基础上,对所有软件包进行一一挑选,把不要用的包挑出来,一一减掉.感觉这种方法难于达到最小,需要较多时间. 加法:重新安装一个最小的 suse 操作系统,再把大家...
awk拼sql时要注意分号,单引号的问题.
以TAB分隔三列第1列: 分表编号 (str)第2列: id (bigint)第3列:title (varchar)要求将分表中对应id的title改为新的title值example: update tablename_nnn set title='很亮吧#%%%' where id=338542209638673 ...
mysql支持gbk(zt)
http://bbs.chinaunix.net/viewthread.php?tid=8654921) configure的时候可以,有个扩展的字符集可以选2) 二进制安装(rmp) set names gbk3) 修改my.cnf default-character-set=gbk 4) 改conf...
linux c程序内存检查器
http://blog.sina.com.cn/s/blog_5902731a0100af71.htmlhttp://dev.mysql.com/doc/refman/5.0/en/tools-used-to-create-mysql.htmlJulian Seward Author of valgrind, an excellent memory checker tool that ha...
apache动态编译/静态编译区别
http://space.itpub.net/16555225/viewspace-495942以前编译apache的时候都是google搜索到的直接拿来用这次自己编译mod_rewrite和ssl遇到了问题又不知道问题出在哪里一个是mod_rewrite模块没有起作用一个是以ssl启...