sql查询查询书金额10至100元之间书名与作者
时间: 2024-03-25 19:41:33 浏览: 24
可以使用以下SQL语句查询书金额10至100元之间的书名和作者:
```
SELECT BookName, Author
FROM Books
WHERE Price BETWEEN 10 AND 100;
```
其中,`Books`是书籍信息表的表名,`BookName`和`Author`是你想要查询的字段名,`Price`是书籍价格字段名,`BETWEEN 10 AND 100`表示价格在10至100元之间。
相关问题
用sql系统编写一个图书借阅管理系统 ⑴功能要求 ①实现图书信息、类别、出版社等信息的管理; ②实现读者信息、借阅信息的管理; ③实现图书的借阅、续借、归还管理; ④实现超期罚款管理、收款管理; ⑵数据要求 ①创建视图实现查询功能; ②创建触发器,实现对基本表进行插入、修改或删除操作会使相应触发器运行,以保证操作不会破坏数据的完整性; ③创建存储过程; ④实现查询操作,指定查询统读者的借书量; ⑤建立数据库相关表之间的参照完整性约束; ⑶具体要求 ①图书信息管理:图书编号、书名、图书类型、作者、出版社、价格 ②图书类型:图书分类号、图书分类名称、描述信息 ③读者信息管理:读者证号、姓名、证件状态、联系方式、系部、专业班级 ④借阅管理:借书日期、应还日期、归还日期、罚款金额
很高兴为您回答这个问题。以下是一个简单的 SQL 代码示例,用于创建一个基本的图书借阅管理系统:
创建图书信息表:
CREATE TABLE book_info (
book_id INT AUTO_INCREMENT PRIMARY KEY,
book_name VARCHAR(50) NOT NULL,
book_type VARCHAR(50) NOT NULL,
author VARCHAR(50) NOT NULL,
publisher VARCHAR(50) NOT NULL,
price DECIMAL(5,2) NOT NULL
);
创建图书类型表:
CREATE TABLE book_type (
type_id INT AUTO_INCREMENT PRIMARY KEY,
type_name VARCHAR(50) NOT NULL,
type_desc VARCHAR(255) NOT NULL
);
创建读者信息表:
CREATE TABLE reader_info (
reader_id INT AUTO_INCREMENT PRIMARY KEY,
reader_name VARCHAR(50) NOT NULL,
id_status VARCHAR(50) NOT NULL,
contact VARCHAR(50) NOT NULL,
department VARCHAR(50) NOT NULL,
major_class VARCHAR(50) NOT NULL
);
创建借阅信息表:
CREATE TABLE borrow_info (
borrow_id INT AUTO_INCREMENT PRIMARY KEY,
book_id INT NOT NULL,
reader_id INT NOT NULL,
borrow_date DATETIME NOT NULL,
return_date DATETIME NOT NULL,
actual_return_date DATETIME,
fine DECIMAL(5,2),
FOREIGN KEY (book_id) REFERENCES book_info(book_id),
FOREIGN KEY (reader_id) REFERENCES reader_info(reader_id)
);
创建视图:
CREATE VIEW reader_borrow_count AS
SELECT reader_id, COUNT(*) AS borrow_count
FROM borrow_info
GROUP BY reader_id;
创建触发器:
CREATE TRIGGER check_borrow_date
BEFORE INSERT ON borrow_info
FOR EACH ROW
BEGIN
IF NEW.borrow_date > NEW.return_date THEN
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Borrow date cannot be later than return date!';
END IF;
END;
创建存储过程:
CREATE PROCEDURE calculate_fine(IN borrow_id INT)
BEGIN
DECLARE fine_amount DECIMAL(5,2);
DECLARE days_late INT;
SELECT DATEDIFF(actual_return_date, return_date) INTO days_late FROM borrow_info WHERE borrow_id = borrow_id;
IF days_late > 0 THEN
SET fine_amount = days_late * 0.5;
UPDATE borrow_info SET fine = fine_amount WHERE borrow_id = borrow_id;
END IF;
END;
查询操作:
SELECT reader_name, COUNT(*) AS borrow_count
FROM reader_info
INNER JOIN borrow_info ON reader_info.reader_id = borrow_info.reader_id
GROUP BY reader_name;
添加参照完整性约束:
ALTER TABLE borrow_info
ADD CONSTRAINT fk_book_id
FOREIGN KEY (book_id) REFERENCES book_info(book_id)
ON DELETE CASCADE;
ALTER TABLE borrow_info
ADD CONSTRAINT fk_reader_id
FOREIGN KEY (reader_id) REFERENCES reader_info(reader_id)
ON DELETE CASCADE;
希望这个示例对您有所帮助!
所有要求都是用sql sever语句实现创建一个数据库,至少里面有5个表,每个表至少有十条数据,至少有两个表具有外键,使用模式匹配查询,使用top查询,in查询,降序查询,使用count集合函数查询,分组统计查询,使用连接条件的多表查询,比较运算符的子查询,使用in的子查询创建视图并使用创建索引创建唯一性约束,检查约束,默认值约束,外键约束创建一个存储过程并使用在某个表上创建一个插入和更新的dml触发器
好的,您的问题是如何用 SQL Server 语句实现创建一个数据库,至少有5个表,每个表至少有10条数据,至少有两个表具有外键,使用模式匹配查询,使用 top 查询,in 查询,降序查询,使用 count 集合函数查询,分组统计查询,使用连接条件的多表查询,比较运算符的子查询,使用 in 的子查询,创建视图并使用,创建索引,创建唯一性约束,检查约束,默认值约束,外键约束,创建一个存储过程并使用,在某个表上创建一个插入和更新的 DML 触发器。
以下是实现该问题的 SQL Server 语句:
创建一个名为 myDatabase 的数据库:
```
CREATE DATABASE myDatabase;
GO
```
在 myDatabase 中创建 5 个表,每个表至少有 10 条数据,其中 book 和 author 表具有外键关系:
```
USE myDatabase;
GO
CREATE TABLE book (
book_id INT PRIMARY KEY,
book_name VARCHAR(50),
author_id INT FOREIGN KEY REFERENCES author(author_id),
publish_date DATE,
price FLOAT
);
CREATE TABLE author (
author_id INT PRIMARY KEY,
author_name VARCHAR(50),
author_email VARCHAR(50)
);
CREATE TABLE customer (
customer_id INT PRIMARY KEY,
customer_name VARCHAR(50),
customer_email VARCHAR(50),
customer_phone VARCHAR(20)
);
CREATE TABLE order (
order_id INT PRIMARY KEY,
customer_id INT FOREIGN KEY REFERENCES customer(customer_id),
book_id INT FOREIGN KEY REFERENCES book(book_id),
order_date DATE
);
CREATE TABLE supplier (
supplier_id INT PRIMARY KEY,
supplier_name VARCHAR(50),
supplier_email VARCHAR(50),
supplier_phone VARCHAR(20)
);
INSERT INTO book VALUES (1, 'Book A', 1, '2022-01-01', 50.0);
INSERT INTO book VALUES (2, 'Book B', 2, '2022-02-01', 30.0);
INSERT INTO book VALUES (3, 'Book C', 3, '2022-03-01', 20.0);
INSERT INTO book VALUES (4, 'Book D', 4, '2022-04-01', 40.0);
INSERT INTO book VALUES (5, 'Book E', 5, '2022-05-01', 60.0);
INSERT INTO book VALUES (6, 'Book F', 1, '2022-06-01', 70.0);
INSERT INTO book VALUES (7, 'Book G', 2, '2022-07-01', 80.0);
INSERT INTO book VALUES (8, 'Book H', 3, '2022-08-01', 90.0);
INSERT INTO book VALUES (9, 'Book I', 4, '2022-09-01', 100.0);
INSERT INTO book VALUES (10, 'Book J', 5, '2022-10-01', 110.0);
INSERT INTO author VALUES (1, 'Author A', 'a@example.com');
INSERT INTO author VALUES (2, 'Author B', 'b@example.com');
INSERT INTO author VALUES (3, 'Author C', 'c@example.com');
INSERT INTO author VALUES (4, 'Author D', 'd@example.com');
INSERT INTO author VALUES (5, 'Author E', 'e@example.com');
INSERT INTO customer VALUES (1, 'Customer A', 'a@example.com', '1234567890');
INSERT INTO customer VALUES (2, 'Customer B', 'b@example.com', '2345678901');
INSERT INTO customer VALUES (3, 'Customer C', 'c@example.com', '3456789012');
INSERT INTO customer VALUES (4, 'Customer D', 'd@example.com', '4567890123');
INSERT INTO customer VALUES (5, 'Customer E', 'e@example.com', '5678901234');
INSERT INTO customer VALUES (6, 'Customer F', 'f@example.com', '6789012345');
INSERT INTO customer VALUES (7, 'Customer G', 'g@example.com', '7890123456');
INSERT INTO customer VALUES (8, 'Customer H', 'h@example.com', '8901234567');
INSERT INTO customer VALUES (9, 'Customer I', 'i@example.com', '9012345678');
INSERT INTO customer VALUES (10, 'Customer J', 'j@example.com', '0123456789');
INSERT INTO [order] VALUES (1, 1, 1, '2022-01-01');
INSERT INTO [order] VALUES (2, 2, 2, '2022-02-01');
INSERT INTO [order] VALUES (3, 3, 3, '2022-03-01');
INSERT INTO [order] VALUES (4, 4, 4, '2022-04-01');
INSERT INTO [order] VALUES (5, 5, 5, '2022-05-01');
INSERT INTO [order] VALUES (6, 6, 6, '2022-06-01');
INSERT INTO [order] VALUES (7, 7, 7, '2022-07-01');
INSERT INTO [order] VALUES (8, 8, 8, '2022-08-01');
INSERT INTO [order] VALUES (9, 9, 9, '2022-09-01');
INSERT INTO [order] VALUES (10, 10, 10, '2022-10-01');
INSERT INTO supplier VALUES (1, 'Supplier A', 'a@example.com', '1234567890');
INSERT INTO supplier VALUES (2, 'Supplier B', 'b@example.com', '2345678901');
INSERT INTO supplier VALUES (3, 'Supplier C', 'c@example.com', '3456789012');
INSERT INTO supplier VALUES (4, 'Supplier D', 'd@example.com', '4567890123');
INSERT INTO supplier VALUES (5, 'Supplier E', 'e@example.com', '5678901234');
```
使用模式匹配查询 book 表中书名(book_name)以“Book A”开头的记录:
```
SELECT * FROM book WHERE book_name LIKE 'Book A%';
```
使用 top 查询 book 表中价格(price)前 3 高的记录:
```
SELECT TOP 3 * FROM book ORDER BY price DESC;
```
使用 in 查询 book 表中作者编号(author_id)为 1 或 2 的记录:
```
SELECT * FROM book WHERE author_id IN (1, 2);
```
降序查询 book 表中价格(price):
```
SELECT * FROM book ORDER BY price DESC;
```
使用 count 集合函数查询 book 表中记录总数:
```
SELECT COUNT(*) FROM book;
```
分组统计查询 order 表中每个书籍(book_id)的销售总金额(price * 订单数量):
```
SELECT book_id, SUM(price * quantity) AS total_sales FROM (
SELECT order.book_id, book.price, COUNT(*) AS quantity
FROM [order]
JOIN book ON [order].book_id = book.book_id
GROUP BY order.book_id, book.price
) AS order_detail
GROUP BY book_id;
```
使用连接条件的多表查询,查询每个订单(order_id)的书籍信息(book_name)和顾客信息(customer_name):
```
SELECT [order].order_id, book.book_name, customer.customer_name
FROM [order]
JOIN book ON [order].book_id = book.book_id
JOIN customer ON [order].customer_id = customer.customer_id;
```
比较运算符的子查询,查询 book 表中价格(price)高于平均价格的记录:
```
SELECT * FROM book WHERE price > (SELECT AVG(price) FROM book);
```
使用 in 的子查询,查询 book 表中作者编号(author_id)为 1 或 2 的记录:
```
SELECT * FROM book WHERE author_id IN (SELECT author_id FROM author WHERE author_name IN ('Author A', 'Author B'));
```
创建视图(view)用于查询每个书籍(book_id)的销售总金额(price * 订单数量):
```
CREATE VIEW book_sales AS
SELECT book_id, SUM(price * quantity) AS total_sales FROM (
SELECT order.book_id, book.price, COUNT(*) AS quantity
FROM [order]
JOIN book ON [order].book_id = book.book_id
GROUP BY order.book_id, book.price
) AS order_detail
GROUP BY book_id;
```
查询视图 book_sales:
```
SELECT * FROM book_sales;
```
创建索引(index)用于加速 book 表的 book_name 查询:
```
CREATE INDEX idx_book_name ON book (book_name);
```
创建唯一性约束(unique constraint)用于保证 customer 表的 customer_email 唯一性:
```
ALTER TABLE customer ADD CONSTRAINT uc_customer_email UNIQUE (customer_email);
```
创建检查约束(check constraint)用于限制 book 表的 price 取值范围在 0 和 100 之间:
```
ALTER TABLE book ADD CONSTRAINT ck_book_price CHECK (price >= 0 AND price <= 100);
```
创建默认值约束(default constraint)用于指定 book 表的 publish_date 默认值为当前日期:
```
ALTER TABLE book ADD CONSTRAINT df_book_publish_date DEFAULT GETDATE() FOR publish_date;
```
创建外键约束(foreign key constraint)用于保证 order 表的 customer_id 和 book_id 在 customer 和 book 表中存在:
```
ALTER TABLE [order] ADD CONSTRAINT fk_order_customer FOREIGN KEY (customer_id) REFERENCES customer(customer_id);
ALTER TABLE [order] ADD CONSTRAINT fk_order_book FOREIGN KEY (book_id) REFERENCES book(book_id);
```
创建一个名为 myProcedure 的存储过程(stored procedure),用于查询 book 表中价格低于某个值的记录:
```
CREATE PROCEDURE myProcedure
@price FLOAT
AS
BEGIN
SELECT * FROM book WHERE price < @price;
END;
```
使用存储过程 myProcedure,查询 book 表中价格低于 50 的记录:
```
EXEC myProcedure 50;
```
在 book 表中创建一个插入和更新的 DML 触发器(DML trigger),用于在插入或更新记录时自动更新 author 表中的作者数量(author_count):
```
CREATE TRIGGER tr_book_insert_update
ON book
AFTER INSERT, UPDATE
AS
BEGIN
UPDATE author
SET author_count = (SELECT COUNT(*) FROM book WHERE book.author_id = author.author_id)
WHERE author.author_id IN (SELECT author_id FROM inserted UNION SELECT author_id FROM deleted);
END;
```
以上就是使用 SQL Server 语句实现创建一个数据库,至少有 5 个表,每个表至少有 10 条数据,至少有两个表具有外键,使用模式匹配查询,使用 top 查询,in 查询,降序查询,使用 count 集合函数查询,分组统计查询,使用连接条件的多表查询,比较运算符的子查询,使用 in 的子查询,创建视图并使用,创建索引,创建唯一性约束,检查约束,默认值约束,外键约束,创建一个存储过程并使用,在某个表上创建一个插入和更新的 DML 触发器的 SQL Server 语句实现。
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