MySQL table design practice: Create a news classification table and tag table

MySQL table design practice: Create a news classification table and tag table

In the process of website development, news classification and tags are very common functions. In order to better organize and manage news information, we need to design corresponding database tables to store and process classification and label-related data. This article will introduce how to use MySQL to create a news classification table and tag table, and provide corresponding code examples.

1. Create a news classification table (news_category)

First, we need to create a news classification table to store the classification information of different news. The table should contain at least the following fields:

• id: Category ID, as the primary key, used to uniquely identify each category.
• name: Category name, used to display and identify different categories.
• create_time: The creation time of the classification, used to record the creation time of the classification.
• update_time: The update time of the classification, used to record the last update time of the classification.

The following is an example of SQL code to create a news classification table:

CREATE TABLE news_category (
  id INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(50) NOT NULL,
  create_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  update_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);

2. Create a tag table (news_tag)

Next, we need Create a tag table to store tag information associated with different news. The table should contain at least the following fields:

• id: Tag ID, used as the primary key to uniquely identify each tag.
• name: Tag name, used to display and identify different tags.
• create_time: The creation time of the label, used to record the creation time of the label.
• update_time: The update time of the label, used to record the last update time of the label.

The following is an example of SQL code to create a tag table:

CREATE TABLE news_tag (
  id INT(11) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  name VARCHAR(50) NOT NULL,
  create_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  update_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);

3. Insert test data

Once the table structure is created, we can Insert some test data into the news classification table and label table for subsequent use and verification. The following is an example of SQL code for inserting test data into the news classification table and label table:

INSERT INTO news_category (name) VALUES ('国际新闻');
INSERT INTO news_category (name) VALUES ('财经新闻');
INSERT INTO news_category (name) VALUES ('科技新闻');

INSERT INTO news_tag (name) VALUES ('体育');
INSERT INTO news_tag (name) VALUES ('娱乐');
INSERT INTO news_tag (name) VALUES ('健康');

4. Querying classification and label data

By using the MySQL SELECT statement, we can Query the corresponding data from the news classification table and tag table. The following is an example of SQL code for querying news classification and label data:

-- 查询所有的新闻分类
SELECT * FROM news_category;

-- 查询所有的新闻标签
SELECT * FROM news_tag;

It should be noted that the above examples only show simple query statements. In actual applications, more complex queries and filter.

Summary:

In website development, news classification and tags are very important functions. Whether their design is reasonable or not is directly related to the organization and management of news information. By creating a news classification table and a tag table, and using corresponding SQL code examples, you can better implement classification and tag related functions. I hope this article will be helpful to everyone in practical MySQL table design.

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