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At what stage in the database system design process is a dataflow diagram completed? I believe that many inexperienced people are helpless about this. For this reason, this article summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

Data flow diagrams are created during the conceptual architecture phase of database system design.

Related knowledge points:

What is a data flow graph?

Data Flow Diagram (DFD). A dataflow diagram (DFD) is a graphical tool for describing the flow of data in a system. It identifies the logical inputs and logical outputs of a system, as well as the processing required to convert logical inputs into logical outputs.

Data flow diagrams are not traditional flowcharts or block diagrams, and data flow is not control flow. A dataflow diagram describes a system from the perspective of the data, while a block diagram describes the system from the perspective of the worker who processes the data.

Data flow graph describes the process of data flow from input to output graphically from the point of view of data transmission and processing.

Data flow diagrams include:

1. Data symbols indicating the existence of data, these data symbols may also indicate the medium used by the data;

2. process symbols indicating the processing performed on the data, which may also indicate the machine functions used for the processing;

Streamline symbols indicating data flows between several processing and/or data media;

4, easy to read and write data flow chart special symbols.

After reading the above, do you know how to complete the dataflow diagram at what stage in the database system design process? If you still want to learn more skills or want to know more related content, welcome to pay attention to the industry information channel, thank you for reading!

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