hierarchical database has advantages over relational database
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A hierarchical database stores information based on its relationship to the information around it. This structure is known as a tree. This makes searching and sorted output fast. Relational databases store information in table form, which makes
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A fundamental difference between segments in a hierarchical database and tables in a relational database is that, in a hierarchical database, segments are implicitly joined with each other. ... In a relational database, this relationship between tables is captured by foreign keys and primary keys.
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