How to design an efficient MySQL table structure to implement the video like function?
Background
In modern social media platforms, likes are a common way for users to express their approval and support for content they like. For a video platform, it is very important to implement the video like function. This article will introduce how to design an efficient MySQL table structure to implement the video like function and provide some code examples.
Design Ideas
When designing the MySQL table structure, you need to consider the following aspects: storage method of user, video and like relationship, querying the number of likes, querying whether the user likes, querying the user's points Liked videos, etc.
CREATE TABLE user
(
id
int(11) NOT NULL AUTO_INCREMENT,
username
varchar(255 ) NOT NULL,
PRIMARY KEY (id
)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
CREATE TABLE video
(
id
int(11) NOT NULL AUTO_INCREMENT,
title
varchar(255 ) NOT NULL,
PRIMARY KEY (id
)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
CREATE TABLE like_relation
(
id
int(11) NOT NULL AUTO_INCREMENT,
user_id
int(11 ) NOT NULL,
video_id
int(11) NOT NULL,
PRIMARY KEY (id
),
UNIQUE KEY user_video_unique
(user_id
,video_id
),
CONSTRAINT like_user_fk
FOREIGN KEY (user_id
) REFERENCES user
( id
) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT like_video_fk
FOREIGN KEY (video_id
) REFERENCES video
(id
) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
Code examples
The following are some commonly used SQL statements used to implement the video like function.
Summary
To design an efficient MySQL table structure to implement the video like function, you need to consider the design of the user table, video table and like relationship table, as well as some common SQL statements to perform like-related operations. Through reasonable table structure design and optimized query statements, the performance and efficiency of the like function can be improved.
The above is the detailed content of How to design an efficient MySQL table structure to implement the video like function?. For more information, please follow other related articles on the PHP Chinese website!