Establishing a product review reply form for the grocery shopping system in MySQL

Building a product review response form for the grocery shopping system in MySQL

With the changes in shopping habits and the rise of e-commerce, more and more people choose to go online Buy fresh vegetables. This has also led to the rise of the grocery shopping system, which not only provides a convenient and fast shopping method, but also allows consumers to understand the evaluation and feedback of other buyers on the products. In this article, we will learn how to build a product review response table in MySQL to help the grocery shopping system better meet the needs of users.

First, we need to create a database table named "product_comments_reply", which will be used to store information related to product review replies. The table structure can be designed as follows:

CREATE TABLE product_comments_reply (
  id INT(11) NOT NULL AUTO_INCREMENT,
  comment_id INT(11) NOT NULL,
  reply_content VARCHAR(255) NOT NULL,
  reply_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  FOREIGN KEY (comment_id) REFERENCES product_comments (id)
);

In the above code, the primary key field "comment_id" is the foreign key associated with the "product_comments" table in the main comments table. This is designed to ensure that each reply is associated with the corresponding comment. The "reply_content" field is used to store the reply content, and the "reply_time" field is used to store the reply time.

Next, we can insert some sample data into the "product_comments_reply" table through the following code example:

INSERT INTO product_comments_reply (comment_id, reply_content)
VALUES (1, '感谢您的评论！'), (2, '非常抱歉给您带来不便，我们会加强产品质量控制。');

The above code will insert two pieces of reply data into the "product_comments_reply" table, where Replied to comments with comment IDs 1 and 2 respectively.

In actual applications, after the user submits a comment, we can use code similar to the following to insert reply data into the "product_comments_reply" table:

INSERT INTO product_comments_reply (comment_id, reply_content)
VALUES (<comment_id>, '<reply_content>');

where "" is The ID of the corresponding comment in the main comment table, "" is the content of the reply.

In the food shopping system, users can browse product pages and view product comments and replies. We can use the following SQL query to jointly query product reviews and replies:

SELECT c.comment_content, r.reply_content
FROM product_comments c
LEFT JOIN product_comments_reply r ON c.id = r.comment_id
WHERE c.product_id = <product_id>;

In the above query, "" is the ID of the corresponding product on the product page. The query results will return the content of each comment and its replies.

Through the above code example, we can create a product review reply table in MySQL to meet the needs of users in the grocery shopping system for product evaluation. Such table structure and sample data can effectively support communication between users and merchants and provide a better user experience.

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