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

Database Design- addiction Diagram - Essay Example non be necessary to show all the data dependencies among the sundry(a) modules because some module might be unconnected in a sequence or era and hence these are not illustrated on a dependency draw. For example, a module might demonstrate 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 plat.The dependency diagrams are also indispensable and useful when there exits complex dependency of module in a database system. Otherwise, the effort which is required to carry through 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 sha re 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