Itqualityassurance
What is a hierarchical table?
A hierarchy table specifies a hierarchy of terms (such as drugs and events) available for selecting criteria for data mining results before viewing them. A hierarchy table has no effect on the generation of statistical results for a run.
What is an example of a hierarchical database?
Examples of Hierarchical Database Systems
IBM's Information Management System (IMS) is an example of a hierarchical database system. Windows Registry is another such example. Another example that you may be aware of is XML data storage that we discussed earlier. XML has a root node enclosing one or more child nodes.
