Database Design- Dependency Diagram Essay Example | Topics and Well Written Essays - 250 words

Database Design- Dependency Diagram - Essay Example not be necessary to show all the data dependencies among the various modules because some module might be unconnected in a sequence or time and hence these are not illustrated on a dependency diagram. For example, a module might give data that cannot be used by another module until time lasts. In this scenario, the existing dependency among these modules will be left off in the dependency diagram. The dependency diagrams are also vital and useful when there exits’ complex dependency of module in a database system. Otherwise, the effort which is required to complete the dependency diagram is not warranted in complex dependencies. In this case the recommendation is the decomposition of the diagram to a less complex one such as an action diagram or a structural chart which is outlined to form a suitable dependency diagram. Action diagrams might not be used to illustrate further elaborate details such as in the shared accesses to the main storage, which is not illustrated in a dependency diagram. A CRUD diagram might also be used to illustrate dependency among some of the processes that are not shown in the dependency diagram such as the year –end time dependency among