Hierarchical Database Model

• This model is based on parent/child relationship just like a tree structure.

• Data is stored 'Records' which are connected to each other through links.

• A record in this model corresponds to a row / tuple in relational database model.

And an entity i.e parent/ child correspond to a table (relation).

*** Each child can have only one parent, where as each parent record can have more child or no child at bottom level.

To retrieve any record the whole tree needs to be traversed starting from root node.

database System

*Records can be accessed and manipulated rapidly as relationship between records are defined in advance.

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