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The Problem

When you are charged with creating a large website powered by a database, the way it is set up heavily affects its ranking in search engines. Even more than static sites, database sites can be optimized to effectively rank for many keywords. For these type of sites the goal is often to rank highly for many long or obscure queries - this is called “the long tail” of search. But what is the best way to optimize a database site? Database sites have their own methodology for optimization, which will be explained below.

Titles

Each page that is served up from your database should have a unique title. Titles are one of the most important factors for Google, Yahoo and MSN when they determine the topic of a webpage. Very often, a site’s developer will simply put the overall site name as the title of all pages on the site. This stems from either laziness or a lack of SEO knowledge on the part of the site’s developer. As pages are extracted from a database and displayed, it is important to dynamically insert their titles into the website template as a tag.

Interlinking

It is best to interlink the pages of your database-powered site. Sometimes this is very easy to do: if your site is a dictionary site, where each page shows a single word’s definitions and synonyms, this is as easy as programmatically making each synonym into a link that points to the synonym’s own definition page. In some cases this is difficult, for example when your site is a blog. In those cases, it is possible to either manually insert “related articles” links into each post, or to take advantage of plugins that display “most popular articles”, or “similarly tagged articles” at the bottom of each post. This interlinking helps your site gain a higher rank because it allows search engines to see the relationship between pages accurately, rather than see them as totally standalone (and possibly relegate them to the supplemental index).

Static Appearance

It is a benefit to have your pages appear as static HTML pages rather than as parameters to a PHP file which retrieves them. This makes your site appear to search engines as though a person took the time to uniquely write out each page. Such changes to the URL are possible using “mod_rewrite”, which is module for the Apache web server (it is a very popular web server, and you always have the option of hosting your website on it). Although it takes time to learn, it is fairly simple to translate a request for a file with a .html extension to the “real” URL of your PHP file with the page name as a parameter.

Descriptive Filenames

Another important factor in the way you structure your URLs is that each page’s URL should have the title in it. This is something that your developer should be able to set up. Doing this will guarantee that any keywords that are present in page titles are also present in the URL - another factor that boosts your search engine rank. You can see this in action when you look at blogs - their titles are almost always present in the URL in some form. Sites like Hubpages also allow for inserting relevant keywords into the URL - which is something that you should also do if your site hosts user-generated content.

Because database-powered sites are often much larger than traditional static sites, there is a lot more scope for success when they are optimized. The above techniques should have you and your developers well on your way towards making your site a heavyweight.



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Oracle Enterprise Database11g has the Virtual Private Database feature to provide security features to your database. Virtual Private Database or VPD is very useful in situations when associated database roles and standard object privileges cannot provide application security requirements. You can set the Virtual Private Database policies to be simple or complex depending upon the amount of security you need to provide to the database.

You can create a secure virtual private database to keep it safe from unauthorized access. Virtual private database is used in environment where multiple users access the same database and only specific information should be available to each group.  The best way to secure your virtual private database is to implement security features during its creation or designing. The level of security is very high as you secure your database instead of controlling it with some other application.

Best way is to associate security policies with the views and tables of the database. It is designed in such a way that security policy is implemented whether you access the data directly or indirectly. What is more? You can also define security policies for a set of statements that eliminates the need to develop security policies individually for all statements. It is also possible to apply multiple policies for a group of views, synonym or tables. 

A new feature known as Column Masking is also used with Virtual Private Database which overcomes the drawbacks of Column relevance. Main problem with column level Virtual Private Database security was that it restricted the rows that contains data for sensitive columns. However, with column masking the data of all such rows is displayed where the sensitive columns have null value. This way more information is available for the authorized users and only the sensitive information is hidden.

Virtual Private Database can be made more secure by providing security at the column or row level by combining VPD with application context feature. Providing security at such deep levels was termed as fine-grained access control or FGAC where you can secure a row or column separately also. Whenever a DML or DDL query is initiated by the user Oracle Database dynamically modifies the query before data retrieval or data manipulation. However, the user is unaware of the security procedures followed at back end, as it is transparent for users and whenever he or she access the data only the authorized information is shown. Moreover, you need not to modify your application code whenever you want to change any of the security policies. Just change the Virtual Private Database policies to grant or deny access to any part of database. Irrelevant of the fact that you use any source to connect to the database, that is, whether you use an application, SQL or web interface, there is no way by which your application security can be infected.

Various other types of VPD policy types such as Static, Shared and Context-Sensitive are also used to provide a better level of security. You may use context-sensitive and static policies to secure multiple database objects. Shared policies would save your overheads on re-executing policy functions repetitively for every query.





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