A hierarchical model is a database model which represents the database in a tree diagram. It thus helps the user to work with(i.e., use, modify, extract etc.) the database without even bothering about the complicated algorithms or flow chart used by the system to deal with the database.
What is central hierarchical database?
optical illusion
Hierarchical.
edirectory
Network Database
hierarchical databases are fast and conceptually simple however do not support many-to-many relationships and have a lack of referential integrity. dan woodfield was a creater of Hierarchical Databases
Because the structure of a hierarchical database is set, indexes can be created and utilized for easily that a relational database, where useful indexing is not often an option. Since an index allows direct access to specific data, data retrieval can be much quicker. Additionally, only a few segments are retrieved at a time with hierarchical data, instead of whole resultsets from relational queries.
well i dont know so sorry
A man called Dr. Edgar Frank Codd in 1996
A hierarchical database organizes data in a "tree like" structure. The "main" data point (known as the parent) may have many "sub" data points (known as children), but each child only has one parent.
Relational model of database is a good way to represent the database. Also network data model and hierarchical model can be used depending on the requirements.
Some disadvantages of the hierarchical database model include complexity in representing certain types of relationships, limited flexibility in querying data due to its rigid structure, and potential data redundancy issues as each child can only have one parent record.