Like everything else, databases have a finite lifespan. They are born in a flush of optimism and make their way through life achieving fame, fortune, and peaceful anonymity, or notoriety as the case may be, before fading out once more. Even the most successful database at some time is replaced by another, more flexible and up-to-date structure, and so begins life anew. Although exact definitions differ, there are generally six stages of the database lifecycle. Show AnalysisThe analysis phase is where the stakeholders are interviewed and any existing system is examined to identify problems, possibilities and constraints. The objectives and scope of the new system are determined. DesignThe design phase is where a conceptual design is created from the previously determined requirements, and a logical and physical design are created that will ready the database for implementation. ImplementationThe implementation phase is where the database management system (DBMS) is installed, the databases are created, and the data are loaded or imported. TestingThe testing phase is where the database is tested and fine-tuned, usually in conjunction with the associated applications. OperationThe operation phase is where the database is working normally, producing information for its users. MaintenanceThe maintenance phase is where changes are made to the database in response to new requirements or changed operating conditions (such as heavier load). Database development is not independent of systems development, often being one component of the greater systems development process. The stages of systems development basically mirror the stages of a database lifecycle but are a superset. Whereas database design deals with designing the system to store the data, systems design is also concerned with the processes that will impact on the data. CommentsContent reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party. This chapter of Database Design (including all images, except as otherwise noted) is a derivative copy of The Database Development Life Cycle by the Open University licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License.The database life cycle (DBLC) defines the stages involved for implementing a database, starting with requirements analysis and ending with monitoring and modification. Furthermore, the DBLC never ends because database monitoring, modification, and maintenance are part of the life cycle, and these activities continue long after a database has been implemented. Put simply, the DBLC encompasses the lifetime of the database. The five stages in the database life cycle are:
1. Requirements analysis 2. Logical Design 3. Physical Design 4. Implementation 5. Monitoring and Modification The first three stages (1. Requirements analysis 2. Logical Design 3. Physical Design) are database-design stages, which are listed below the diagram shown above. I. Requirements analysisRequirements Analysis is the first and most important stage in the Database Life Cycle. II. Logical designDuring the first part of Logical Design, a conceptual model is created based on the needs assessment performed in stage one. A conceptual model is typically an entity-relationship (ER) diagram that shows the tables, fields, and primary keys of the database, and how tables are related (linked) to one another.
III. Physical DesignThe Physical Design stage has only one purpose: to maximize database efficiency. Developing Conceptual ModelIn this course, you will complete the tasks associated with Requirements Analysis and the first part of Logical Design: developing a conceptual model. The next lesson provides an overview of the post-design stages of the DBLC. Database Design for Mere Mortals What are the phases of database development?The database development life cycle includes eight steps that help guide us through the creation of a new database. The steps are planning, requirement gathering, conceptual design, logical design, physical design, construction, implementation and rollout, and finally ongoing support.
What are the four main phases of database design?The methodology is depicted as a bit by bit guide to the three main phases of database design, namely: conceptual, logical, and physical design.
What are the 4 types of database?A relational database management system is one of four common types of systems you can use to manage your business data.. hierarchical database systems.. network database systems.. object-oriented database systems.. What is the first phase of database development?The first step is requirements gathering. During this step, the database designers have to interview the customers (database users) to understand the proposed system and obtain and document the data and functional requirements.
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