Grouping data is the process of combining columns with duplicate values in a logical order. For example, a database may contain information about employees; many employees live in different cities, while some employees live in the same city. You may want to execute a query that shows employee information for each particular city. You are [...]
Single-Column Indexes
Indexing on a single column of a table is the simplest and most common manifestation of an index. Obviously, a single-column index is one that is created based on only one table column.
Normalization provides numerous benefits to a database. Some of the major benefits include the following :
Greater overall database organization
Reduction of redundant data
Data consistency within the database
A much more flexible database design
A better handle on database security
This provides several examples of queries based on the concepts that have been discussed. The hour begins with the simplest query you can issue, and builds upon the initial query progressively. You use the EMPLOYEE_TBL table.
Selecting all records from a table and displaying all columns:
SELECT * FROM EMPLOYEE_TBL;
Selecting all records from a table and displaying [...]
Views can be utilized as a form of security in the database. Let’s say you have a table called EMPLOYEE_TBL. The EMPLOYEE_TBL includes employee names, addresses, phone numbers, emergency contacts, department, position, and salary or hourly pay. You have some temporary help come in to write some reports; you need a report of employees‘ names, [...]
The system catalog contains a variety of information accessible to many users and is sometimes used for different specific purposes by each of those users.
The system catalog contains information such as the following:
User accounts and default settings
Privileges and other security information
Performance statistics
Object sizing
Using SQL to generate SQL is a very valuable time-budgeting method of writing SQL statements. Assume you have 100 users in the database already. A new role, ENABLE (a user-defined object that is granted privileges), has been created and must be granted to those 100 users. Instead of manually creating 100 GRANT statements, the following [...]
The increasing email marketing has integrated with the ecommerce properly. The ecommerce has gained so much strength to get advertising and promotion going on. Web based email marketing software allows the small website owners to easily create, manage, and analyze your email marketing campaigns.
Actually the email marketing is more intelligent than creating the email list. [...]
Once you have realized the potential savings in time and expense which even average use of the Internet can deliver, you will be keen to get started. The process of getting online is not difficult, but as you will discover, once you are connected you may well have to change the entire way you do [...]
This afternoon, Matthew call me ask my help, he was given 48 hours to back up his old data from his web hosting because the web hosting company complain about his website consume too much cpu. I know about his website, a wordpress mu blog system with some modifies, it should not that big and [...]
A little help with the mass web hosting marketing campaign, here is something for bloggers to find their blog a perfect web hosting provider.
Is cheap web hosting all right? Always remember “There is no free lunch”. Most cheap host web hosting cut off some expensive cost on some fancy staff the beginning users may not [...]
Just because you are setting up an online business you should not neglect other more established marketing tools. As well as branding all your marketing materials with your new e-business references, you should consider more traditional PR techniques to get your Web site noticed.
Like real-world gambling casinos, Web sites often work best when they have many entry points, lots for users to do, and as few exit points as possible. (This last item is quite different from providing newsletter subscribers with a way to unsubscribe. In that case, an exit point is comforting to the user and inspires [...]
Included among the larger grouping of search sites are three types: search engines, directories, and portals. They all compile information about Web sites and make that information searchable by users. How they do it differs.
But in all cases, when a user conducts a search, the results that are returned appear in a list. The list [...]
Search engines, directories, and portals all include search capabilities in their offerings, and they usually work in more or less the same way — user types topic of interest into text box, user clicks Search button — you know the routine. The search is executed, and the results are returned in a list that’s been [...]
Although the meta tag can lead indirectly to an infringing link, HTML permits more direct violation by automatically pulling graphics and other elements off one Web site onto another without permission, using the <imgsrc => and other similar tags. Every Web page is made up of many different files,
The issues involve in actually selling goods or services to children draw from those of advertising, as well as data collection, and some others concerns unique to the sales process. First, it is crucial that you let children know when they are in fact buying something. It’s too easy even for adults to misinterpret an [...]
Registering your site at the major search engines is your first and most important step in marketing your Web store. Although there are hundreds and hundreds of search engines, directories, and yellow pages that you can register your site with, you should register your site first with these major search engines.
Anyone with proper access to the company’s computer network can read any e-mail message coming in or going out to the Internet. As a result, determining whether Steve Smith is sending a price quote to a customer or a résumé to a competitor is as easy as scanning his e-mails.
Just because this is technically simple, [...]
Like E-mail, Web access has many legitimate business uses. But staff access to the Web or other downloads, such as file transfer protocol (FTP), opens up the door to data, software, and documents that can harm the company.
The business risks associated with improper Web use and downloads include serious human resources issues as well. Web [...]
