Database Awareness Management System Design 20

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It's a big topic.

To put it another way: what do you need to prepare for designing a database management system?

1) Do business needs analysis. According to the idea of simple database development, the functions and modules of the system are determined. Complete work such as data dictionaries. Collectively referred to as System Requirements Analysis.

2) Select the front-end development language or the surrounding chaos, select the back-end database, and consider whether you want to port.

3) Personnel in the development phase.

4) Personnel at the testing stage.

5) Check the difficulty and collect the file, and try to run.

6) Personnel in the maintenance phase.

No; The former is the design application, and the latter is how to design the software.

Database design refers to the construction of the optimal database schema and the establishment of the database and its application system for a given application environment.

This enables it to store data efficiently and meet the application needs (information requirements and processing requirements) of various users. In the field of databases, the various types of systems that use databases are often referred to collectively as database application systems.

A database management system is a large-scale software that manipulates and manages databases, and is used to establish, use, and maintain databases, or DBMS for short.

It manages and controls the database in a unified manner to ensure the security and integrity of the database. Users access the data in the database through the DBMS, and the database administrator also uses the DBMS to maintain the database.

It enables multiple applications and users to create, modify, and interrogate databases in different ways, at the same time or at different times.

Most DBMS provide Data Definition Language (DDL) and Data Manipulation Language (DML).

It allows users to define the schema structure and permission constraints of the database, and realize operations such as appending and deleting data.

The basic functions of a database management system (DBMS) are as follows:

1) Data definition function. The DBMS provides the appropriate data language to define (DDL) database structures, which are the framework of the characterization database and are stored in the data dictionary.

2) Data access function. The DBMS provides Data Manipulation Language (DML) to enable basic access operations to database data: retrieval, insertion, modification, and deletion.

3) Database operation management function. DBMS provides data control functions, that is, data security, integrity, and concurrency control to effectively control and manage database operation to ensure that data is correct and effective.

4) Establishment and maintenance of databases. It includes the loading of initial database data, database dumping, recovery, reorganization, system performance monitoring, analysis and other functions.

5) Transmission of databases. The DBMS provides the transmission of processing data and enables communication between the user program and the DBMS, usually in coordination with the operating system.

Database Technology and Application - Database Management System.

According to the standard design method, a complete database design is generally divided into the following six phases:

Requirements Analysis: Analyze user needs, including data, functionality, and performance requirements;

Conceptual structure design: mainly using the E-R model for design, including drawing E-R diagrams;

Logical structure design: Convert the E-R model to the relational model by converting the E-R diagram into a table.

Database physical design: mainly to select the appropriate storage structure and access path for the designed database;

Database implementation: including programming, testing, and commissioning;

Database operation and maintenance: system operation and daily database maintenance.

Database design refers to constructing the optimal database schema for a given application environment.

Database management system is a large-scale software that manipulates and manages databases.

To put it simply, the former is a design application, and the latter is a design software development.

If you really can't do it, go to the Internet and cut off a supermarket management system. Meet your requirements.

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