MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -A hierarchical database is a data model in which data is stored in the form of records and organized into a tree-like structure, or parent-child structure, in which one parent node can have many child nodes connected through links.

Detailed explanation-2: -The hierarchical structure was developed by IBM in the 1960s and used in early mainframe DBMS. Records’ relationships form a treelike model. This structure is simple but inflexible because the relationship is confined to a one-to-many relationship.

Detailed explanation-3: -7) Hierarchical Databases It is the type of database that stores data in the form of parent-children relationship nodes.

Detailed explanation-4: -Hierarchical database model is a data model in which data are organised into a tree-like structure. The data are stored as records which are connected to one another through links.

Detailed explanation-5: -Parent-Child Tree Structure in Relational Databases For SQL to do anything with it, a parent-child tree structure has to be stored in a relational database. These structures are usually stored in one table with two ID columns, of which one references a parent object ID.