What is the function of restoring the database in EB software?

You're asking questions here.

I thought I had an answer, and I was overjoyed.

Opened disappointed.

Xu Yuan's child, tomorrow's exam is not there's an answer?

Use database backup software to back up your MySQL database.

(1) The data can be stored on the disk of external storage for a long time in the form of "files". As computer applications shift to information management, files need to be queried, modified, and inserted in a large number of ways.

2) The logical structure of the data is different from the physical structure, and the program and the data are separated, so that the data and the program have a certain degree of independence, but it is relatively simple. The logical structure of data refers to the form of data structure that is presented to the user. The physical structure of data refers to the actual structure in which data is stored on a computer storage device.

There is "device independence" between degree and data, meaning that the program can work with the data by just the file name, regardless of the physical location of the data. Access methods (reads and writes) are provided by the file system of the operating system.

3) The organization of documents has been diversified. There are index files, linked files, and direct access files, among others. However, the documents are independent of each other and lack of connection. The connections between data need to be programmed.

4) The data no longer belongs to a specific program and can be reused, i.e. the data is application-oriented. However, the design of the file structure is still based on a specific purpose, and the program is based on a specific physical structure and access method, so the dependency between the degree and the data structure has not fundamentally changed.

5) The user's program and data can be stored on the external memory separately, and each application can share a set of data, so as to realize the data sharing file system with file as the unit.

6) The operation of the data is recorded in units. This is due to the fact that only the data is stored in the file, and no structural description of the file record is stored. Files are created, accessed, queried, inserted, deleted, modified and other operations must be realized by programs.

7) The data processing methods include batch processing and online real-time processing.

Strictly speaking, a database is "a warehouse that organizes, stores, and manages data according to a data structure." In the daily work of economic management, it is often necessary to put some relevant data into such a "warehouse" and process it accordingly according to the needs of management. For example, the personnel department of an enterprise or public institution often stores the basic information of its employees (employee number, name, age, gender, place of origin, salary, resume, etc.) in a table, which can be regarded as a database.

There you have this"Data warehouse"We can inquire about the basic situation of an employee at any time as needed, and we can also inquire about the number of employees whose wages are within a certain range, etc. If all this work can be done automatically on the computer, then our personnel management can reach a very high level. In addition, it is also necessary to establish a large number of such in financial management, warehouse management, and production management"Databases", so that it can use the computer to realize the automatic management of finance, warehouse, and production.

A relatively complete definition of a database is given: a database is a collection of related data stored together, which is structured, free of harmful or unnecessary redundancy, and serves multiple applications; The storage of the data is independent of the program that uses it; Inserting new data into the database, modifying and retrieving old data can all be done in a common and controlled manner. When there are several databases in a system that are structurally separate, the system contains a "database collection".

Definition 2: A database is a collection of data that is organized according to a data model and holds in secondary storage. This data collection has the following characteristics: it is as non-duplicative as possible, serves multiple applications of a particular organization in the best possible way, its data structure is independent of the applications that use it, and the addition, deletion, modification and retrieval of data are managed and controlled by unified software.

From the perspective of development history, database is an advanced stage of data management, which is developed by document management systems.

The role of the database:

1. Realize data sharing: Data sharing includes all users who can access the data in the database at the same time, and also includes users who can use the database through the interface in various ways and provide data sharing.

2. Reduce data redundancy: Compared with the file system, because the database realizes data sharing, it avoids users from creating application files separately. Reduces large amounts of duplicate data, reduces data redundancy, and maintains data consistency.

3. Maintain data independence: Data independence includes logical independence (the logical structure of the database and the application in the database are independent of each other) and physical independence (the change of the physical structure of the data does not affect the logical structure of the data).

4. Centralized control of data: In the file management mode, the data is in a decentralized state, and there is no relationship between different users or the same user in different processes. The database allows for centralized control and management of data, and a data model that represents the organization of various data and the connections between them.

5. Data consistency and maintainability to ensure the security and reliability of data: mainly including: security control, integrity control, and concurrency control, so that in the same time period, multiple access to data is allowed, and abnormal interaction between users can be prevented.

6. Fault recovery: The database management system provides a set of methods to detect and repair faults in time, so as to prevent data from being destroyed. The database system can recover as quickly as possible from a failure that occurs when the database system is running, which may be a physical or logical error.

For example, data errors caused by misoperation of the system, etc.

In university computer textbooks, databases are explained as follows: A database is a system of computer application systems that specializes in managing data resources. Data comes in many forms, such as text, numbers, symbols, graphics, images, and sounds.

Data is the object that all computer systems are meant to process. A well-known processing method is to make a file, that is, to compile the processing process into a program file, organize the data involved into a data file according to the program requirements, and use the program file to call. The data file maintains a certain correspondence with the program file.

In the context of the rapid development of computer applications, this document-based approach has become inadequate. For example, it makes data less versatile, not easy to port, stores a lot of duplicate information in different files, wastes storage space, and is inconvenient to update. A database system solves this problem.

The database system does not start from the specific application, but is based on the management of the data itself, it saves all the data in the database, carries out scientific organization, and with the help of the database management system, it is used as an intermediary to interface with various applications or application systems, so that it can easily use the data in the database.

This description is indeed very detailed, but you may be dizzy to see it, in fact, a database is simply a set of computer-organized data, stored in one or more files, and the software that manages this database is called a database management system. Generally, a database system can be divided into two parts: database and database management system (DBMS).

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Manage all kinds of data in an orderly manner, and provide a unified interface and service for other applications.

Manage data for data queries and storage of a class.

It's like when you play Honor of Kings, lol

The equipment information, monster information, maps, etc., all need to be stored in a library in advance, and this library is the database.

There is no software without a database, and the software is all about managing and storing data, and what is the use of having an empty shell without a database.

To put it simply, a database is all about data.

A database, as the name suggests, is a warehouse where data is stored. It's just that this warehouse is on a computer storage device, and the data is stored in a certain format.

When people have collected a large amount of data, they should be saved for further processing to extract useful information. In the past, people stored data in filing cabinets, but now with the development of society, the amount of data has increased dramatically, and now people use computer and database technology to save a large amount of data scientifically, so as to make better use of these data resources.

If it were to be defined, it would be: a collection of organized, shareable data stored in a computer for a long time.

Databases include relational databases, object-oriented databases and emerging XML databases, and the most widely used ones are relational databases. In the early days of database technology, hierarchical databases and mesh databases were popular, but these two types of databases are rarely used today.

Resources.

Database management system.

Generally, database management systems come with database backup and recovery functions.

If you don't know what database you use, SQL, MySQL or SQLSer, you can try Yunqi Technology's disaster recovery and backup software.

It is to manage and store software data, just like putting your QQ personal information in the database in the background of the QQ server.

It can be understood here that it is to store and manage data.

In the previous database-first development paradigm, a shift to an object-oriented paradigm was required at a later stage.

Agile development, as it is now advocated, is just a software project management methodology. The goal is to implement software that meets the needs of users as quickly as possible and at the lowest cost. In the specific software design and development stage, it is necessary to use object-oriented analysis, design, development, etc. to carry out specific software development.

That is to say, the main users of agile development are project managers, and then project managers want us to adopt agile practices to guide our development tasks, and object-oriented is a martial art that we programmers must master.

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Database is a powerful software, in our general people do not use this kind of software, but as a programmer this software is a very useful software, no database can be said that there is no Internet, why do I say this, because the data in the network is very huge, we can not use our office software to achieve the management of these data, so at this time we use the database to solve this problem very well.

To put it bluntly, a database is of little use to the average person, it is just a piece of software used to put data

It's useless, just dealing with huge amounts of data.

(1) Narrow the scope of retrieval and data to facilitate collection and application.

2) The structure is clear and the theme is clear, which is easy to monitor and manage.

3) Meet the needs of strategic analysis.

4) The database of deep processing is more in line with the characteristics of the industry.

5) Conducive to knowledge management.