MySQL implements the price management function of the ordering system

MySQL implements the price management function of the ordering system, requiring specific code examples

With the development of the catering industry, more and more restaurants are beginning to use the ordering system to improve efficiency and customer satisfaction. Among them, the price management function is a very important part of the ordering system. Through the support of MySQL database, we can easily implement price management functions to meet the needs of restaurants.

Next, we will introduce in detail how to implement the price management function of the ordering system in the MySQL database.

First, we need to create corresponding tables in the MySQL database to store dish and price information. The specific table structure can be as follows:

CREATE TABLE `menu` ( `id` INT(11) NOT NULL AUTO_INCREMENT, `name` VARCHAR(50) NOT NULL, `price` DECIMAL(10,2) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;

In themenutable, we define three fields:id,nameandprice.idis the unique identifier of the dish,nameis the name of the dish, andpriceis the price of the dish.

Next, we can insert some test data into themenutable for subsequent price management operations. You can use the following statement to insert data:

INSERT INTO `menu` (`name`, `price`) VALUES ('鱼香肉丝', 25.00), ('宫保鸡丁', 30.00), ('红烧肉', 35.00);

Through the above operations, we have inserted the name and price information of three dishes into themenutable.

Next, we can implement functions such as price query, modification and deletion.

First of all, we can query the price of the dish through the following statement:

SELECT `name`, `price` FROM `menu` WHERE `name` = '鱼香肉丝';

This statement will return the price information of the dish named "Shredded Pork with Fish Flavor".

Next, if you need to modify the price of a certain dish, you can use the following statement:

UPDATE `menu` SET `price` = 20.00 WHERE `name` = '鱼香肉丝';

This statement will modify the price of the dish "Shredded Pork with Fish Flavor" to 20.00.

Finally, if you need to delete the price information of a certain dish from the database, you can use the following statement:

DELETE FROM `menu` WHERE `name` = '红烧肉';

This statement will delete the price information of the dish named "Braised Pork".

Through the above code example, we can see how to use MySQL to implement the price management function of the ordering system. In order to facilitate the use and management of the ordering system, we can also combine other functions to implement batch import, export and regular update of prices to meet the different needs of restaurants.

In short, through the support of MySQL database, we can easily implement the price management function of the ordering system. I believe that through the above code examples, readers will have a clearer understanding of how to implement price management functions in MySQL. I hope this article will be helpful to readers in learning and applying MySQL database.

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