Harvey File
Harvey File
What is Db2? History, Editions, and Video Illustrations
Historical Background
DB2 is a relational database management system produced by IBM that IBM refers to as a "data server." What is a relational database? A relational database is a set of files that has been analyzed for all of the relationships between fields. The related fields are pulled out of the original files in order to minimize redundancy in the data being stored. For example, instead of storing the information that TN is the state Tennessee in every record, that information is pulled out of the original file and stored only once in a state code file.
The idea of a relational database first arose in 1970 when Dr. E.F. Codd formally stated a number of algebraic rules that could be applied to data manipulation. IBM left the application of Codd's principles to a group of programmers that created a language that was eventually called SQL (Structured Query Language). DB2 was the name given to the Database Management System in 1982, and it is the first database to use SQL.
At first, DB2 was only available on IBM mainframes, but during the 1990's DB2 spread to many other platforms, LUW (Linux, Unix, Windows), mid-range computers i5/OS (formerly AS/400) and even on PDAs. During the 90s, IBM also introduced it's Universal Server. The Universal Server shifted the technology to an object-related SQL DBMS that allows developers to define their own data types from more primitive data types.
In 2001, IBM bought Informix and incorporated many of it's database features into the DB2 product suite.
In 2006, IBM announced "Viper," the codename for DB2 9 on distributed platforms and DB2 9 on z/OS. DB2 9 offers the ability to store XML "natively," and it also allows storage compression to save on disk space. pureXML(tm) is the name that IBM uses to talk about the ability to store XML natively.
IBM's biggest competitors are Teradata for Data Warehousing and Oracle. Microsoft's SQL Server and MySQL are serious competitors in the smaller environments.
Editions
IBM's Product Summary page for DB2 (http://www-306.ibm.com/software/data/db2/) allows one to download the various editions after registering. The DB2 Express-c edition is free, and the other editions allow you to have a 90-day free trial.
IBM will send you a free Discovery DVD (https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?lang=en_US&source=swg-db2kit) that has: # DB2 Express-C 9 (Linux and Windows), # DB2 Developer Workbench (Linux and Windows), # a comparison of all Editions from Express to Enterprise, # webcasts, tutorials, and much more!
Here is a list of some of the major features of several of the DB2 Editions:
1. DB2 9 Express for Linux, Sun Solaris x86, Windows is an excellentl entry level data server. Suitable for transaction processing or complex query workloads on servers with up to two processors. (2 processors & 4 Gig RAM) Starting at $4,874 per processor of $165 per user (minimum of 5 users).
1.a. DB2 Express-C is a free version of DB2 Express Edition (DB2 Express) for the community. DB2 Express-C is a free data server that can be used in development and deployment of applications including: XML, C/C++, Java, .NET, PHP, and more. DB2 Express-C can be run on up to 2 dual-core CPU servers, with up to 4 GB of memory, any storage system setup and with no restrictions on database size or any other artificial restrictions. (Linux and Windows)
2. DB2 9 Workgroup for LUW - provides all of the features of DB2 Express with scalability to larger servers. (4 processors & 16 Gig RAM)
3. DB2 9 Enterprise for LUW - Includes all of the features of DB2 Workgroup plus features required to provide the scalability to handle high user loads and provide 24
About the Author
Wade Harvey has been in data processing field for over 20 years. His blog is idealprogrammer.com This blog provides programmers with the tools and resources that they need to help them become ideal programmers.
Are you one of those people that won't share?
Even when I give you these eyes:
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Harvey File
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Different Styles and Types of Office Desks
Furniture is a very important part of any office. Furniture consists of office desks, chairs, file cabinets, computer tables, sofas, reception desks, etc. Can you imagine an office without desks and chairs? Desks and chairs are the most important components amongst the other furniture. Everyday work, operations and functions are carried out with the help of the furniture. Adesk helps you in safely storing important official files and folders. Papers, pens and computers can be placed on the desk. Desks and chairs are the furniture that is used all day long. A correct type of desk helps you to increase the productivity of the company.
Here in this article the all of the attention is on the desk and the various types that are available. Proper desks are required to hold files, folders, important official papers, important documents and other simple things like office stationery, a computer and its peripherals if required. Desks are used almost the entire day. Selecting a correct desk for the office amongst the other types of desks is not as easy as it seems.
There are several types of office desks available on the market which are constructed by manufacturers and the carpenters. We offer you a quick overview of the different types of office desks available on the market for your business.
Type 1: Computer Desk
No matter how many hours you spend on your computer, you should always choose one which suits your needs and requirements. This type of desk is primarily made for the computer and for computing purposes. But this does not mean that it is specifically for placing computer and its peripherals. Nowadays, computer desks are designed to hold much more than just computers. No doubt it is specifically designed with computing in mind. The best thing about the modern computer desk is that every required item can be placed here, even the components of different computer types can be adjusted without any problem.
Type 2: Reception Desks
Reception desks are for the reception area of your office. It is used basically by a receptionist to guide the visitors, clients and customers. The reception desks are made up of different styles, types, shapes and materials according to the company's needs and requirements. The reception desk is the best way or method of impressing people coming into your business. Thus, the reception desk should be designed keeping in mind that it is a part of the office which is often seen by the public.
.Type 3: L-shaped desks
The name of the desk itself describes its shape. This type of desk is designed for allowing maximum usage as well as most efficient use of space. This is basically a multiple use desk that can be used anywhere in the office.
Type 4: U-Shaped Desks:
This type of office desk is in the shape of a U. They allow you to utilize the maximum possible space in a most efficient manner. They also provide a lot of space to work and even move about. It also grants you with yours own private space. It is the best and the most ideal office desk for the person who has to do many tasks and has to keep track of many documents.
About the Author
If you work in an office, you know that the office desks are the most important pieces of office furniture. It is at the desk where the staff works. When a desk is not properly chosen, productivity can suffer and cause profit to decrease. Therefore, choose your office furniture desk carefully. Be sure to visit or call OficeDr.com to review their complete collection of office desks. 856-368-9085
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Harvey File
