數(shù)據(jù)庫的研究及其在工程項(xiàng)目中的應(yīng)用

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摘 要

本文主要介紹了有關(guān)數(shù)據(jù)庫的原理、類型、發(fā)展前景及其在空調(diào)系統(tǒng)中的應(yīng)用。主要編程語言為Microsoft Visual Basic6.0，通過創(chuàng)建數(shù)據(jù)庫，將空調(diào)硬件系統(tǒng)中單片機(jī)送入的外界溫度信息存入數(shù)據(jù)庫，并對這些數(shù)據(jù)進(jìn)行一系列處理，從而形成溫度曲線等，并將處理完的數(shù)據(jù)送入通風(fēng)管的顯示系統(tǒng)中。該系統(tǒng)能夠更好的完成外界溫度信息的存儲、調(diào)用，并輔助硬件系統(tǒng)完成對外界溫度的控制。
1 數(shù)據(jù)
數(shù)據(jù)是指存儲在某一種媒體上能夠識別的物理符號。數(shù)據(jù)的概念包括兩個方面：其一是描述事物特性的數(shù)據(jù)內(nèi)容；其二是存儲在某一種媒體上的數(shù)據(jù)形式。
2 數(shù)據(jù)庫
數(shù)據(jù)庫是與特定的主題或目的相關(guān)的數(shù)據(jù)的集合。數(shù)據(jù)庫可以直觀地理解為存放數(shù)據(jù)的倉庫，只不過這個倉庫是在計算機(jī)的大容量存儲器上。而且數(shù)據(jù)必須按照一定的格式存放，因?yàn)樗粌H需要存放，而且還要便于查找。
3 數(shù)據(jù)庫系統(tǒng)
數(shù)據(jù)庫系統(tǒng)是指擁有數(shù)據(jù)庫技術(shù)支持的計算機(jī)系統(tǒng)，它可以實(shí)現(xiàn)有組織地、動態(tài)地存儲大量相關(guān)數(shù)據(jù)，提供數(shù)據(jù)處理和信息資源共享服務(wù)。數(shù)據(jù)庫系統(tǒng)不僅包括數(shù)據(jù)本身，即實(shí)際存儲在計算機(jī)中的數(shù)據(jù)，還包括相應(yīng)的硬件、軟件和各類人員。

關(guān)鍵詞：數(shù)據(jù)，數(shù)據(jù)庫，數(shù)據(jù)庫系統(tǒng)

ABSTRACT

This article introduces the principles of the database, type, and its development prospects in the air-conditioning system applications. The main programming language is Microsoft Visual Basic6.0. Through the establishment of the database, we can send the temperature information in the database, make a series of process for these data, thus form temperature curve, and send the data of processing back into the ventilation system. The system can be better accomplished outside temperature information storage, and assistant the hardware system to complete the control of the outside temperature.
1 Data
Data is stored in a particular means of identification media to the physical symbols. Data concept has two aspects : One is to describe things identity data; Second, the media stored in a particular data format.
2 Database
Databases with specific themes or purposes related data assembly. Database can store data for visual understanding of the warehouse, the warehouse is only in the large-capacity computer memory. And data must be stored in accordance with a certain format, because it requires storage, but also ease of reference.
3 Database system
Database system is a computer database technical support system, it can achieve organized and dynamically store a large amount of related data, providing data processing and information resources shared services. Database system includes not only the data itself, the actual data stored in the computer, including the corresponding hardware, software and personnel of all categories
Key words：data; databases; database systems

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