Sql Crash Course Online

No database system can avoid a crash situation, even if you use a clustered, two-machine hot standby ... It is still not possible to completely eradicate the single point of failure in the system, and for most users, this expensive hardware investment cannot be sustained. So, when the system crashes, how to restore the original valuable data becomes an extremely important problem. In the recovery, the ideal situation is that your data files and log files are intact, so that only need to sp_attach_db, the data file attached to the new database, or in the downtime of the ...

As an outstanding representative of the Object relational database, Oracle is undoubtedly the most powerful. Whether it's the size of the database, the support of multimedia data types, the parallelism of SQL operations replication, or the security services, Oracle is much stronger than Sybase, Informix, Added to the latest version of the Oracle8.0.4 is to enhance the characteristics of this, but also introduced a number of new features, such as: Data partitioning (partitioning), Object-relational technology (objects relational T ...

Intermediary trading http://www.aliyun.com/zixun/aggregation/6858.html"> SEO Diagnostic Taobao Guest Hosting Technology Hall Telecom bandwidth costs continue to increase, coupled with IDC industry practitioners increased the number of companies compete more and more Intense, virtually in a price war kicked off, IDC industry profits from the original profits into the present meager profit, first Beijing Zhongsuo evaporate, not long ago came the well-known Chinese IDC service providers, Hua Kai announced ...

SME network security guidelines. [Theory] As the training site said, the enterprise's network security is a system, do all aspects of what is a major project, even if only a branch of network security also takes a long time to build, so in the early need to resolve the current main contradictions (ie "Stop bleeding" and control most of the risks in the first place). Based on the past experience of several of our people, we suggest that you have the following key positions in the control, you can achieve more with less effort immediate effect: 1) port control. All server non-business ports are all closed to the internet, managing ...

Intermediary transaction SEO diagnosis Taobao Guest Cloud mainframe technology hall Haha, since you opened this article, I guess you are a web developer. 　　Although the development of the site than to consider the host aspects of the problem more interesting, but the host choice is indeed a very important thing, not hasty decision, otherwise endless. 　　This article pointed out 20 in the selection of Web site host must pay attention to the problem, I hope to help you. 1 capacity when selecting a host, the first thing you think about is "how much data can I store?...

Now has entered the cloud computing era, distributed computing, flexible billing has become possible, "resources + operation + security" is the basic services of IDC service providers, focus on resources and operation, and the relatively weak security protection of IDC service providers, how to ensure the cloud computing era of information security? With the Mengjin of information technology, all kinds of powerful security tools are emerging, but the problem of information security is not only alleviated, but increasingly serious. 　　Especially for IDC service providers, not only to face the traditional threat, but also to face endless, unpredictable new challenges. But security issues ...