What are the main stages of the database design process?
What are the main stages of the database design process?
The database design stage includes five stages, namely: requirements analysis stage, conceptual structure design stage, logical structure design stage, physical design stage, database implementation stage, database operation and maintenance stage.
Independent of the database management system are: requirements analysis stage, conceptual design stage, logical design stage, and physical design stage.
Depends on the database management system: implementation phase, operation and maintenance phase.
Database design is the technology for establishing databases and their application systems, and is the core technology in the development and construction of information systems. Due to the complexity of the database application system, in order to support the operation of related programs, the database design becomes extremely complex.
Therefore, the best design cannot be achieved overnight, but can only be a process of "repeated exploration and gradual refinement", that is, planning and structuring the data objects in the database and the relationships between these data objects. process.
Extended information:
Formation process
1. Requirements analysis stage: Comprehensive application requirements of each user (Data flow diagram (DFD).
2. Conceptual design stage: Form a conceptual model (E-R diagram) that is independent of machine characteristics and independent of each DBMS product.
3. Logical design stage : First, convert the E-R diagram into a data model supported by a specific database product, such as a relational model, to form a database logical model; then, based on user processing requirements and security considerations, establish the necessary views (View ), forming the external schema of the data.
4. Physical design stage: According to the characteristics of the DBMS and processing needs, physical storage arrangements are made, indexes are established, and the internal schema of the database is formed.
The above is the detailed content of What are the main stages of the database design process?. For more information, please follow other related articles on the PHP Chinese website!
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