What is Hierarchical Data Model and Network data model
1.Hierarchical Data Model:- A Hierarchical Data Model request the data in tree like structure in which there is a single parent for each record. To maintain order there is a sort fields which. keep sibling in (child node) into a recorded manner. This type of models are designed basically foe the early main frame database management system like the information management system This model allow one to one and one to many relationship between various type of data . The hierarchical structure is used as the from a physically order of record on storage .Advantage of hierarchical model A user can retrive data very quickly due to the presence of explicit links between the structure .Disadvantage of hierarchical model This type of database connect support complex relationship. When a user need to store the record in child to table that is currently to the unrelated to any record in a parent table than it gets difficult to record the user d...
