How to create a new MySQL database

MySQL is a popular relational database management system that is open source and has a high degree of reliability, stability and flexibility. It can be used for data storage in web applications and can also handle large-scale data processing such as data analysis or data mining.

Before using MySQL, you need to install it first, and then create your first database in MySQL. Below is a simple guide showing how to create a new MySQL database.

Step 1: Install MySQL

To install MySQL on your computer, you must first download the installation program for the operating system from the MySQL official website www.mysql.com and follow the prompts step by step Install it.

Step 2: Start MySQL

After installing MySQL, you need to start it so that you can create the database. You can find the MySQL service on the control panel. If MySQL is not installed as a service, open the MySQL folder on the console and find mysql.exe in the bin subdirectory (Win7 is usually in C:\Program Files\MySQL\MySQL Server 5.6 \bin), and then run it, the command is as follows:

mysql -u root -p

-u specifies the MySQL account to log in to, root is an account with the highest authority, and -p means that you need to enter a password to verify the login.

Step 3: Create a new MySQL database

After you successfully log in to the database management system, you can create your first database in MySQL. The following is sample code to create a database named mydatabase:

create database mydatabase;

This command will create a new database named mydatabase. Now, you need to tell MySQL that you want to use this new database. The command is as follows:

use mydatabase;

Step 4: Create tables

Now that you have created a new MySQL database, you need to add some tables to it to store data. A table is the most basic data unit in a database. You can think of it as an Excel table.

The following is a sample code to create a user table containing three fields: id, username and password:

CREATE TABLE user(
id INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
username VARCHAR(50) NOT NULL,
password VARCHAR(50) NOT NULL);

This code creates a table named user, which contains three fields: id, username and password. Among them, the id field is set as the primary key, and its automatic numbering is not empty (NOT NULL).

Now, you have successfully created a MySQL database and added a table to it. You can create other tables, modify tables, and delete tables using the above commands. MySQL provides many advanced functions, such as indexes, transactions, stored procedures, etc. If you want to use more advanced database functions, please refer to the MySQL official manual.

Summary:

• Install MySQL
• Start the MySQL service
• Log in to MySQL
• Create a new MySQL database
• Create a new table

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