Why are database management systems (DBMS) important in the business community?

Why are database management systems (DBMS) important in the business community? A database management system (DBMS) is designed to manage a large body of information. Data management involves both defining structures for storing information and providing mechanisms for manipulating the information. In addition, the database system must provide for the safety of the stored information, despite system crashes or attempts at unauthorized access. If data are to be shared among several users, the system must avoid possible anomalous results due to multiple users concurrently accessing the same data. Examples of the use of database systems include airline reservation systems, company payroll and employee information systems, banking systems, credit card processing systems, and sales and order tracking systems. A major purpose of a database system is to provide users with an abstract view of the data. That is, the system hides certain details of how the data are stored and maintained. Thereby, data can be stored in complex data structures that permit efficient retrieval, yet users see a simplified and easy-to-use view of the data. The lowest level of abstraction, the physical level, describes how the data are actually stored and details the data structures. The next-higher level of abstraction, the logical level, describes what data are stored, and what relationships exist among those data. The highest level of abstraction, the view level, describes parts of the database that are relevant to each user; application programs used to access a database form part of the view level. http://answers.yahoo.com/question/index?qid=20080114160614AAvxJ5l

Computer Joke

Computer Joke

A language instructor was explaining to her class that French nouns, unlike their English counterparts, are grammatically designated as masculine or feminine. Things like ‘chalk’ or ‘pencil,’ she described, would have a gender association although in English these words were neutral. Puzzled, one student raised his hand and asked, “What gender is a computer?” The teacher wasn’t certain which it was, and so divided the class into two groups and asked them to decide if a computer should be masculine or feminine. One group was comprised of the women in the class, and the other, of men. Both groups were asked to give four reasons for their recommendation.

The group of women concluded that computers should be referred to in the masculine gender because:

1. In order to get their attention, you have to turn them on.
2. They have a lot of data but are still clueless.
3. They are supposed to help you solve your problems, but half the time they ARE the problem.
4. As soon as you commit to one, you realize that, if you had waited a little longer, you might have had a better model.

The men, on the other hand, decided that computers should definitely be referred to in the feminine gender because:

1. No one but their creator understands their internal logic.
2. The native language they use to communicate with other computers is incomprehensible to everyone else.
3. Even your smallest mistakes are stored in long-term memory for later retrieval.
4. As soon as you make a commitment to one, you find yourself spending half your paycheck on accessories for it.