Information, being the basis of various electronic data exchange systems, is organized in a special way and is called databases. To understand this concept, as well as to understand what a database structure is, it is worth considering this phenomenon in more detail.
Most often, the following requirements should be followed when creating a database . It should be easy to process and be compact, devoid of redundant information. In a hierarchical system, elements are arranged in such a way that links between them are formed - child and parent. That is, this information is located higher or lower in relation to a certain object of the system. But one of them is always the main one, with which the whole system begins. As a result of this arrangement of information blocks, a tree-like database structure is formed, which is characteristic of the file system applicable to computers.
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Thus, databases are a specially structured system, one of the ways of storing information in which can be a tabular form. The totality of several tables that have logical connections between themselves, and create a database.