4. MySQL tutorial

Mysql

MySQL is the most popular relational database management system, and MySQL is one of the best RDBMS (Relational Database Management System: relational database management system) applications in WEB applications.

In this tutorial, you will quickly grasp the basic knowledge of MySQL and easily use the MySQL database.

4.1. What is a database?

Database (Database) is a warehouse that organizes, stores and manages data according to the data structure.

Each database has one or more different API for creating, accessing, managing, searching, and replicating saved data.

We can also store data in a file, but it is relatively slow to read and write data in the file.

So now we use a relational database management system (RDBMS) to store and manage large amounts of data. The so-called relational database is a database based on the relational model, which deals with the data in the database with the help of mathematical concepts and methods such as set algebra.

RDBMS is the characteristics of relational database management system (Relational Database Management System):

  • 1.数据以表格的形式出现

  • 2.每行为各种记录名称

  • 3.每列为记录名称所对应的数据域

  • 4.许多的行和列组成一张表单

  • 5.若干的表单组成database

4.2. RDBMS terminology

  • 4.2.1. MySQL tutorial

    MySQL is the most popular relational database management system, and MySQL is one of the best RDBMS...
    2025-10-25 12:31:22 UTC

  • 4.2.2. MySQL installation

    The MySQL download address for all platforms is: MySQL 下载 . Pick what you need. MySQL Community...
    2025-10-25 12:31:23 UTC

  • 4.2.3. MySQL management

    Start and shut down the MySQL server ¶ Under the Windows system ¶ ...
    2025-10-25 12:31:23 UTC

  • 4.2.4. MySQL PHP syntax

    MySQL can be used in many languages, including PERL, C, Cellular, JAVA and PHP. Among these languages, MySQL is the mo...
    2025-10-25 12:31:19 UTC

  • 4.2.5. MySQL connection

    Connect using mysql binary ¶ You can use MySQL binary to enter the mysql command promp...
    2025-10-25 12:31:19 UTC

  • 4.2.6. MySQL creates a database

    After logging into the MySQL service, we can use the create Command to create the database, ...
    2025-10-25 12:31:22 UTC

  • 4.2.7. MySQL deletes the database

    Using ordinary users to log in to the MySQL server, you may need specific permissions to create or delete MySQL databa...
    2025-10-25 12:31:23 UTC

  • 4.2.9. MySQL data type

    Defining the type of data field in MySQL is very important for optimizing your database. MySQL supports many ...
    2025-10-25 12:31:18 UTC

  • 4.2.10. MySQL creates a data table

    The following information is required to create an MySQL data table: Table name ...
    2025-10-25 12:31:22 UTC

  • 4.2.11. MySQL delete data table

    Deleting tables in MySQL is very easy to operate, but you have to be very careful when deleting tables, because all da...
    2025-10-25 12:31:19 UTC

  • 4.2.12. MySQL insert data

    Used in the MySQL table INSERT INTO SQL statement to insert data. You can insert data into the...
    2025-10-25 12:31:20 UTC

  • 4.2.13. MySQL query data

    The MySQL database uses SQL SELECT statements to query data. You can query the data in the database from the ...
    2025-10-25 12:31:19 UTC

  • 4.2.14. MySQL WHERE clause

    We know that SQL SELECT statements are used to read data from the MySQL table. To conditionally select data f...
    2025-10-25 12:31:21 UTC

  • 4.2.15. MySQL UPDATE update

    If we need to modify or update the data in MySQL, we can use the SQL UPDATE command to do so. Grammar ...
    2025-10-25 12:31:20 UTC

  • 4.2.16. MySQL DELETE statement

    You can use SQL’s DELETE FROM command to delete records in the MySQL datasheet. You can do it in the ...
    2025-10-25 12:31:19 UTC

  • 4.2.17. MySQL LIKE clause

    We know that we use the SQL SELECT command in MySQL to read data, and we can read data in the SELECT ...
    2025-10-25 12:31:23 UTC
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In recent years, Geographic Information Systems (GIS) have undergone rapid development in both theoretical and practical dimensions. GIS has been widely applied for modeling and decision-making support across various fields such as urban management, regional planning, and environmental remediation, establishing geographic information as a vital component of the information era. The introduction of the “Digital Earth” concept has further accelerated the advancement of GIS, which serves as its technical foundation. Concurrently, scholars have been dedicated to theoretical research in areas like spatial cognition, spatial data uncertainty, and the formalization of spatial relationships. This reflects the dual nature of GIS as both an applied technology and an academic discipline, with the two aspects forming a mutually reinforcing cycle of progress.

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