MySQL implements the order evaluation management function of the ordering system

MySQL implements the order evaluation management function of the ordering system

In the catering industry, the order evaluation management function is a very important part. Through the evaluation management function, stores can understand customer satisfaction with food and services, thereby optimizing business strategies and providing better services. MySQL is a tool widely used in database management. This article will introduce how to use MySQL to implement the order evaluation management function of the ordering system and provide specific code examples.

First, we need to create a database to store order evaluation information. A database named "order_evaluation" can be created using the following SQL statement:

CREATE DATABASE order_evaluation;

Next, we need to create a table named "evaluation" to store the details of the order evaluation. You can use the following SQL statement to create this table:

USE order_evaluation;

CREATE TABLE evaluation (
  id INT(11) NOT NULL AUTO_INCREMENT,
  order_id INT(11) NOT NULL,
  rating FLOAT NOT NULL,
  comment TEXT,
  PRIMARY KEY (id),
  FOREIGN KEY (order_id) REFERENCES orders(id)
);

The above SQL statement creates a table named "evaluation", which contains fields such as evaluation ID, order ID, rating, and comments. Among them, the ID of the evaluation is an auto-incrementing primary key, and the ID of the order is a foreign key, referring to the "id" field in the "orders" table.

Before inserting order evaluation, we need to create a table named "orders" to store order information and insert some test data. You can use the following SQL statement to create the table and insert test data:

CREATE TABLE orders (
  id INT(11) NOT NULL AUTO_INCREMENT,
  customer_id INT(11) NOT NULL,
  order_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  total_price DECIMAL(8,2) NOT NULL,
  PRIMARY KEY (id)
);

INSERT INTO orders (customer_id, total_price) VALUES (1, 50.00);
INSERT INTO orders (customer_id, total_price) VALUES (2, 25.00);
INSERT INTO orders (customer_id, total_price) VALUES (3, 35.00);

Next, we can use the following SQL statement to insert some test data into the "evaluation" table:

INSERT INTO evaluation (order_id, rating, comment) VALUES (1, 4.5, '餐品非常美味，服务也很好！');
INSERT INTO evaluation (order_id, rating, comment) VALUES (2, 3.0, '餐品一般般，服务稍微有些慢。');
INSERT INTO evaluation (order_id, rating, comment) VALUES (3, 5.0, '完美的用餐体验，非常满意！');

The above SQL statement Three pieces of order evaluation information were inserted into the "evaluation" table, and evaluations were inserted for the orders with order IDs 1, 2, and 3.

In order to provide a better user experience, we can also query the order and its evaluation information and display it through the following SQL statement:

SELECT o.id, o.order_time, o.total_price, e.rating, e.comment
FROM orders o
LEFT JOIN evaluation e ON o.id = e.order_id;

The above SQL statement combines the "orders" table with " evaluation" table to query the order ID, order time, total price, ratings and comments.

Through the above operations, we successfully used MySQL to implement the order evaluation management function of the ordering system. Stores can understand customer feedback through the evaluation management function, optimize dishes and services, and provide a better dining experience.

The above code examples are for reference only and need to be adjusted and optimized according to specific needs during actual use. At the same time, we can further expand the database and add more fields to record the detailed information of the evaluation, such as the user name of the evaluator, evaluation time, etc. I hope this article will be helpful for everyone to understand and use MySQL to implement the order evaluation management function of the ordering system.

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