I. Introduction
1. Conceptual understanding of data, database, database management system, database system
A, DATA: It is a set of words, data, and symbols describing objective things, and is an objective thing reflection and record. And information is the meaning of data, it reflects the status characteristics of various things in the objective world, which can grow knowledge and affect the behavior of the recipient. B, Database: It is a long-term stored in computer or media, organized, and shared data collection. It has low redundancy, high shared property, high independence and easy extension. C, DBMS: This is a data management software (system software) between users and operating systems. The establishment of the database, the use and maintenance must have unified management and control. D, DBS: consisting of DB, DBMS, and development tools, application systems, DBA, and users.
2. Cognition of database technology and development
Database technology is generated by the need for data management tasks. Data management refers to how to classify, organize, encode, store, retrieve, and maintain data, and is the central issue of data processing. Data management has experienced the following three stages: a, manual management phase B, file system phase C, database system stage
3, data technology research direction
The main research scope has the following three areas: A, DBMS software development: expand function, improve performance and improve users productivity B, DB design: Main task is to support in DBMS, according to application requirements for a department and The organization design is reasonable, easy to use, high efficiency database and application system C, DB theory: centralized research relationship standardization, relational data theory
Second, data model
1. Elements of the data model
2, concept model
3, data model
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Third, database system structure
1, DBS mode structure
2, DBS architecture
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Fourth, database management system
1, DBMS function and composition
2, DBMS work process
3, DBMS implementation method
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V. Project and Application of Database
1, DB design objectives and features
2, DB design method
3, DB application
