ORACLE 11G DBA course given in English.
This course is aim to train the great DBA with good English speaking.
In recent years, more demands of Oracle DBA, but most of Senior DBAs are required to speak good English.
English has become the great barrier for more peoples in their career development, you must have the deep feeling about it if you work in the foreign company.
In IT English course, Learning IT knowledge in English just like killing two birds with one stone, not only it can help you to master of Professional IT English terminologies as soon as possible, but it can help you to take the reins of IT technology, enjoy yourself to listen to the Professional English IT lectures.
Therefore, Oracle 11G DBA courses come to you at the right time, this is for those who has the basic English background and willing to be the Professional Oracle DBA.
Requirements: good English listening, no need of Database or relevant computer experience.
First 10 registers could get the discount, please contact me as soon as you can.
Of course, you can cancel your membership at any time. There is no risk. Try my VIP Program for you and speak English confidently, grow more successful and become a true DBA.
Learn path:
1.The SQL introuduction
2.PLSQL introuduction
3.Database Architecture
4.Backup and Recovery
5.Performance Tuning
6.High availability
And also provide the On demand course per the customer requirements.
For more information, please contact me by MSN
baiwentao@hotmail.com
相关文档：
以上为转载,多数并未验证.
其中,select trunc(sysdate,'dd') from dual,得到的是: 2009-3-23 上午12:00:00 ,与下文并不一样!
oracle trunc()函数的用法
1.TRUNC(for dates)
TRUNC函数为指定元素而截去的日期值。
其具体的语法格式如下：
TRUNC（date[,fmt]）
其中：
date 一个日期值
fmt 日期格式，该日期将 ......
SQL中的单记录函数
一、字符函数
1.ASCII
返回与指定的字符对应的十进制数;
SQL> select ascii(’A’) A,ascii(’a’) a,ascii(’0’) zero,ascii(’ ’) space from dual;
A A ZERO SPACE
--------- --------- --------- ---------
65 97 48 32
......
--获取两时间的相差豪秒数
select ceil((To_date('2008-05-02 00:00:00' , 'yyyy-mm-dd hh24-mi-ss') - To_date('2008-04-30 23:59:59' , 'yyyy-mm-dd hh24-mi-ss')) * 24 * 60 * 60 * 1000) 相差豪秒数 from DUAL;
/*
相差豪秒数
----------
86401000
1 row selected
*/
--获取两时间的相差秒数
select ce ......
序列(SEQUENCE)是序列号生成器，可以为表中的行自动生成序列号，产生一组等间隔的数值(类型为数字)。其主要的用途是生成表的主键值，可以在插入语句中引用，也可以通过查询检查当前值，或使序列增至下一个值。
创建序列需要CREATE SEQUENCE系统权限。序列的创建语法如下：
CREATE SEQUENCE 序列名
[INCREMENT BY n]
[ST ......
今天在网上乱逛，看到一篇不错的文章，关于ORACLE密码文件的，理论学习+个人实践，呵呵，复制过来，方便以后学习。
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理论部分
Oracle关系数据库系统以其卓越的性能获得了广泛的应用，而保证数据库安全性是数据库管理工作的重要内容。本 ......
