用sql写一篇复杂的诗词管理系统
时间: 2023-11-05 22:04:14 浏览: 48
好的,以下是一个复杂的诗词管理系统的 SQL 数据库设计:
```
-- 创建作者表
CREATE TABLE authors (
author_id INT PRIMARY KEY,
author_name VARCHAR(255) NOT NULL,
birth_year INT,
death_year INT
);
-- 创建诗词表
CREATE TABLE poems (
poem_id INT PRIMARY KEY,
poem_title VARCHAR(255) NOT NULL,
poem_content TEXT NOT NULL,
author_id INT NOT NULL,
FOREIGN KEY (author_id) REFERENCES authors(author_id)
);
-- 创建朝代表
CREATE TABLE dynasties (
dynasty_id INT PRIMARY KEY,
dynasty_name VARCHAR(255) NOT NULL
);
-- 创建朝代和作者的关系表
CREATE TABLE dynasty_author (
dynasty_id INT NOT NULL,
author_id INT NOT NULL,
PRIMARY KEY (dynasty_id, author_id),
FOREIGN KEY (dynasty_id) REFERENCES dynasties(dynasty_id),
FOREIGN KEY (author_id) REFERENCES authors(author_id)
);
-- 创建朝代和诗词的关系表
CREATE TABLE dynasty_poem (
dynasty_id INT NOT NULL,
poem_id INT NOT NULL,
PRIMARY KEY (dynasty_id, poem_id),
FOREIGN KEY (dynasty_id) REFERENCES dynasties(dynasty_id),
FOREIGN KEY (poem_id) REFERENCES poems(poem_id)
);
```
通过上述 SQL 代码,我们建立了四个表格:作者表、诗词表、朝代表和朝代与作者、诗词的关系表。这个系统可以用于管理古代诗词的信息,包括作者、诗词内容和朝代等方面的信息。用户可以通过 SQL 查询语句获取各种信息,例如:
- 查询某个朝代的所有作者:`SELECT authors.author_name FROM authors JOIN dynasty_author ON authors.author_id = dynasty_author.author_id WHERE dynasty_author.dynasty_id = [朝代id]`
- 查询某个作者的所有诗词:`SELECT poem_title, poem_content FROM poems WHERE author_id = [作者id]`
- 查询某个朝代的所有诗词:`SELECT poem_title, poem_content FROM poems JOIN dynasty_poem ON poems.poem_id = dynasty_poem.poem_id WHERE dynasty_poem.dynasty_id = [朝代id]`
通过这个复杂的诗词管理系统,用户可以方便地获取各种关于古代诗词的信息。