MySQL Database Tutorial PDF219

Introduction

MySQL is a powerful and popular open-source relational database management system (RDBMS). It is used by millions of websites and applications around the world. MySQL is known for its speed, reliability, and scalability. It is also very easy to use, making it a great choice for beginners and experienced developers alike.

Getting Started

To get started with MySQL, you will need to download and install the software. You can download MySQL from the official MySQL website. Once you have installed MySQL, you can create a new database by using the following command:
CREATE DATABASE my_database;

You can then connect to your new database by using the following command:
USE my_database;

Creating Tables

Tables are used to store data in MySQL. To create a new table, you can use the following command:
CREATE TABLE my_table (
id INT NOT NULL AUTO_INCREMENT,
name VARCHAR(255) NOT NULL,
email VARCHAR(255) NOT NULL
);

This command will create a new table called "my_table" with three columns: "id," "name," and "email." The "id" column is an auto-incrementing integer that will be used to uniquely identify each row in the table. The "name" and "email" columns are both VARCHAR columns, which can store up to 255 characters each.

Inserting Data

To insert data into a table, you can use the following command:
INSERT INTO my_table (name, email) VALUES ('John Doe', '@');

This command will insert a new row into the "my_table" table with the name "John Doe" and the email address "@."

Selecting Data

To select data from a table, you can use the following command:
SELECT * FROM my_table;

This command will select all of the rows from the "my_table" table.

Updating Data

To update data in a table, you can use the following command:
UPDATE my_table SET name = 'Jane Doe' WHERE id = 1;

This command will update the name of the row with the id of 1 to "Jane Doe."

Deleting Data

To delete data from a table, you can use the following command:
DELETE FROM my_table WHERE id = 1;

This command will delete the row with the id of 1 from the "my_table" table.

Conclusion

This is just a brief introduction to MySQL. For more information, please refer to the official MySQL documentation.

2024-11-29

Previous：How To Replace Your Phone‘s Charging Port

Next：Java Game Development Tutorial: Creating a Simple 2D Game