Operation mode

yunzuo

〖moveandoperate〗 Operation and operation refers to the state of operation in progress

The term "pattern" refers to a wide range of hidden regular relationships between objects, which do not have to be images or patterns, but can also be numbers, abstract relationships, and even ways of thinking. Patterns emphasize formal laws rather than substantive laws.

The experience accumulated by predecessors abstraction and sublimation . Simply put, it is the law found and abstracted from the repeated events, like the summary of the experience of solving problems. As long as something is recurring over and over again, there may be a pattern.

Each discipline and industry has its own fixed model, but any model is constantly developing and innovating.

An intuitive and concise description of the internal and external mechanisms of objective things, which is a simplified form of theory and can provide people with the overall content of objective things.

It, in fact, is an objective existence of the law, can be simply regarded as a mathematical formula, how to improve the internal steps, according to the different situations we encounter to dredging, so as to achieve the ideal purpose.

[Database system structure]

in Database system Three level pattern structure, divided into External schema , mode and Internal schema . External mode, also known as submode or user mode, yes Database user The interface to the database system is seen by the database user Data view . Patterns can be subdivided into Conceptual model And logical patterns are all Database user The public data view, yes Archive In the overall data Logical structure And description of features. The internal schema, also known as the storage schema, is the database Physical structure The description of the storage mode is the representation of the data in the database way .

Clearly the mode of operation here belongs to the first mode .