教室管理信息系统中触发器及存储过程的设计代码

好的，以下是一个更完整的教室管理信息系统中触发器及存储过程的设计代码，仅供参考：

-- 创建排课表
CREATE TABLE scheduling (
    schedule_id INT PRIMARY KEY AUTO_INCREMENT,
    classroom_id INT,
    course_id INT,
    teacher_id INT,
    schedule_time DATETIME
);

-- 创建教室表
CREATE TABLE classroom (
    classroom_id INT PRIMARY KEY AUTO_INCREMENT,
    classroom_name VARCHAR(50),
    floor INT,
    capacity INT
);

-- 创建课程表
CREATE TABLE course (
    course_id INT PRIMARY KEY AUTO_INCREMENT,
    course_name VARCHAR(50)
);

-- 创建教师表
CREATE TABLE teacher (
    teacher_id INT PRIMARY KEY AUTO_INCREMENT,
    teacher_name VARCHAR(50)
);

-- 创建教室占用情况表
CREATE TABLE classroom_occupancy (
    occupancy_id INT PRIMARY KEY AUTO_INCREMENT,
    classroom_id INT,
    schedule_time DATETIME,
    occupied TINYINT(1)
);

-- 创建触发器：在排课表中插入记录时，更新教室占用情况表
CREATE TRIGGER update_classroom_occupancy
AFTER INSERT ON scheduling
FOR EACH ROW
BEGIN
    UPDATE classroom_occupancy
    SET occupied = 1
    WHERE classroom_id = NEW.classroom_id
    AND schedule_time = NEW.schedule_time;
END;

-- 创建触发器：在排课表中删除记录时，更新教室占用情况表
CREATE TRIGGER delete_classroom_occupancy
AFTER DELETE ON scheduling
FOR EACH ROW
BEGIN
    UPDATE classroom_occupancy
    SET occupied = 0
    WHERE classroom_id = OLD.classroom_id
    AND schedule_time = OLD.schedule_time;
END;

-- 创建触发器：在教室占用情况表中插入记录时，更新排课表
CREATE TRIGGER update_scheduling
AFTER INSERT ON classroom_occupancy
FOR EACH ROW
BEGIN
    UPDATE scheduling
    SET classroom_id = NEW.classroom_id
    WHERE schedule_time = NEW.schedule_time
    AND occupied = 1;
END;

-- 创建触发器：在教室占用情况表中删除记录时，更新排课表
CREATE TRIGGER delete_scheduling
AFTER DELETE ON classroom_occupancy
FOR EACH ROW
BEGIN
    UPDATE scheduling
    SET classroom_id = NULL
    WHERE schedule_time = OLD.schedule_time
    AND occupied = 0;
END;

-- 创建存储过程：查询某个教室在某个时间段内的占用情况
DELIMITER $$
CREATE PROCEDURE get_classroom_occupancy(
    IN classroom_name VARCHAR(50),
    IN start_time DATETIME,
    IN end_time DATETIME
)
BEGIN
    SELECT scheduling.schedule_time, course.course_name, teacher.teacher_name
    FROM scheduling
    INNER JOIN classroom ON scheduling.classroom_id = classroom.classroom_id
    INNER JOIN course ON scheduling.course_id = course.course_id
    INNER JOIN teacher ON scheduling.teacher_id = teacher.teacher_id
    WHERE classroom.classroom_name = classroom_name
    AND scheduling.schedule_time BETWEEN start_time AND end_time;
END $$
DELIMITER ;

-- 示例调用存储过程
CALL get_classroom_occupancy('101教室', '2022-01-01 08:00:00', '2022-01-01 10:00:00');

这段代码包含了教室管理信息系统中的数据库表、触发器和存储过程的设计。具体来说，排课表、教室表、课程表和教师表分别用于存储排课信息、教室信息、课程信息和教师信息；教室占用情况表用于记录每个教室在每个时间段内的占用情况。

触发器主要用于在排课表和教室占用情况表之间实现数据同步。当插入、删除或更新排课表或教室占用情况表时，触发器会自动触发，从而更新另外一个表中的数据。

存储过程用于封装一组SQL语句，并通过参数化的方式提供给外部调用。在这个例子中，存储过程用于查询某个教室在某个时间段内的占用情况，可以通过调用存储过程来获取结果。

需要注意的是，这段代码仅供参考，具体的数据库设计需要根据实际情况进行调整和完善。