Data Base Management Software

A common operation both at work and at home is that of storing information. This storage may be as simple as a 3- by 5-inch index card box of recipes or as complex as rows of filing cabinets containing personnel records. We may wish to rearrange the information or search for a particular element or group of ele­ments that has specific attributes. With data base management software, a user can perform the same operations on a computer. In a sense, this type of package acts as an "electronic filing clerk." The term data base refers to a collection of information that is arranged for easy manipulation and retrieval. A good example of popular data base management software is Microsoft Access.

The simplest data base management packages enable their users to create a single data base file that can be rearranged or searched as needed. More sophisticated packages enable the user to work with multiple data base files to find and manage information. An important operation using data base management software is sorting. When a data base file is sorted, it is arranged according to characteristic, for example, in alphabetical order or in numerical order, depend­ing on the user's need.

Another important operation in working with a data base is that of retriev­ing elements that match a given criterion. The user can also specify a second and even a third criterion, and the elements that match all of the criteria can then be output. Data base management packages are very important when an individual or a firm must manage large volumes of data in such a way that infor­mation needed to make a decision is easily found.

Не нашли, что искали? Воспользуйтесь поиском: