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2024年5月24日发(作者：)

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Database Development Process

Based on information engineering information systems planning database is a source

of development projects. These new database development projects is usually in order to

meet the strategic needs of organizations, such as improving customer support, improve

product and inventory management, or a more accurate sales forecast. However, many

more database development project is the bottom-up approach emerging, such as

information system user needs specific information to complete their work, thus

beginning a project request, and as other information systems experts found that

organizations need to improve data management and begin new projects. Bottom-up even

in the circumstances, to set up an enterprise data model is also necessary to understand

the existing database can provide the necessary data, otherwise, the new database, data

entities and attributes can be added to the current data resources to the organization.

Both the strategic needs or operational information needs of each database

development projects normally concentrated in a database. Some projects only

concentrated in the database definition, design and implementation of a database, as a

follow-up to the basis of the development of information systems. However, in most

cases, the database and associated information processing function as a complete

information systems development project was part of the development.

one. System Development Life Cycle

Guide management information system development projects is the traditional

process of system development life cycle (SDLC). System development life cycle is an

organization of the database designers and programmers information system composed

of the Panel of Experts detailed description, development, maintenance and replacement

of the entire information system steps. This process is because Waterfall than for every

step into the adjacent the next step, that is, the information system is a specification

developed by a piece of land, every piece of the output is under an input. However shown

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in the figure, these steps are not purely linear, each of the steps overlap in time (and thus

can manage parallel steps), but when the need to reconsider previous decisions, but also

to roll back some steps ahead. (And therefore water can be put back in the waterfall!)

The system development life cycle including each stage and database

development-related activities, therefore, the question of database management systems

throughout the entire development process. In Figure 5 we repeat of the system

development life cycle stage of the seven, and outlines the common database at each

stage of development activities. Please note that the systems development life cycle

stages and database development steps exists between the relationship between the

concept of modeling data in both systems development life cycle stages between.

1.1 Enterprise Modeling

Database development process from the enterprise modeling (system development

life cycle stage of the project feasibility studies, and to choose a part)

Organizations set the scope and general database content. Enterprise modeling in

information systems planning and other activities, these activities determine which part

of information systems need to change and strengthen the entire organization and

outlines the scope of data. In this step, check the current database and information

systems, development of the project as the main areas of the nature of the business, with

a very general description of each term in the development of information systems when

needed data. Each item only when it achieved the expected goals of organizations can be

when the next step.

1.2 Conceptual Data Modeling

One has already begun on the Information System project, the concept of data

modeling phase of the information systems needs of all the data. It is divided into two

stages. First, it began the project in the planning stage. At the same time outlining the

establishment of other documents to the existing database without considering the

circumstances specific development projects in the scope of the required data. This

category only includes high-level data (entities), and main contact. Then in the system

development life-cycle analysis stage must have a management information system set

the entire organization Details of the data model definition of all data attributes, listing all

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