I have never done any serious SQL design before. Anyways I have to store a hierarchical data structure, similar to a tree in a SQL database.<BR><BR>Right now I simply add a "parent_id" column in each ...

A database organization method that is structured in a hierarchy. All access to data starts at the top of the hierarchy and moves downward; for example, from customer to orders, vendor to purchases, ...

LONDON--(BUSINESS WIRE)--Quantzig, a pure-play analytics solutions provider, has announced the completion of their latest article on the four key types of database management systems. Data is the new ...

Hierarchical databases are often considered the most natural representation because XML itself is a hierarchy of elements and character data. Tamino, a hierarchical XML data store based on Adabas, ...

A database that maintains a set of separate, related files (tables), but combines data elements from the files for queries and reports when required. The concept was developed in 1970 by Edgar Codd, ...