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What is Hierarchical DBMS Model Overview about?

There are five models of database management systems (DBMS) that are distinguished by how they represent stored data: 1) The hierarchical model organizes data in a downward tree structure and uses pointers to navigate between stored data. It was the first DBMS model. 2) The network model also uses pointers but does not require a downward tree structure like the hierarchical model. 3) The relational model stores data in two-dimensional tables and manipulates it based on relational theory. By the late 19

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izzul_125z1419

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