How to use mysql database

To use a database in MySQL, you need to go through six steps: connect to the database, create the database, select the database, create the table, insert data, and query the data. Other useful commands include modify table structure, update data, delete data, delete table, show all databases, and show all tables in the current database.

How to use the database in MySQL

Step 1: Connect to the database

Use the MySQL command line client or GUI tool to connect to the MySQL database. You need to provide your database username, password, and database name.

<code class="shell">mysql -u 用户名 -p 数据库名</code>

Step 2: Create the database

If you have not created the database you want to use, use the following command:

<code class="sql">CREATE DATABASE 数据库名;</code>

Step 3: Select the database

Use the following command to select the database to use:

<code class="sql">USE 数据库名;</code>

Step 4: Create the table

The table is Container for storing data. Use the following command to create the table:

<code class="sql">CREATE TABLE 表名 (
   字段名 数据类型,
   ...
);</code>

Step 5: Insert data

Use the following command to insert data into the table:

<code class="sql">INSERT INTO 表名 (字段名, ...) VALUES (值, ...);</code>

Step 6: Query data

Use the following commands to query data from the table:

<code class="sql">SELECT 字段名 FROM 表名 WHERE 条件;</code>

Other useful commands:

• ALTER TABLE: Modify the table structure.
• UPDATE: Update the data in the table.
• DELETE: Delete data from the table.
• DROP TABLE: Delete the table.
• SHOW DATABASES: Show all databases.
• SHOW TABLES: Display all tables in the current database.

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